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diff --git a/public/javascripts/application.js b/public/javascripts/application.js
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+// Place your application-specific JavaScript functions and classes here
+// This file is automatically included by javascript_include_tag :defaults
diff --git a/public/javascripts/controls.js b/public/javascripts/controls.js
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index 0000000..de0261e
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+++ b/public/javascripts/controls.js
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+// Copyright (c) 2005 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
+//           (c) 2005 Ivan Krstic (http://blogs.law.harvard.edu/ivan)
+//           (c) 2005 Jon Tirsen (http://www.tirsen.com)
+// Contributors:
+//  Richard Livsey
+//  Rahul Bhargava
+//  Rob Wills
+// 
+// See scriptaculous.js for full license.
+
+// Autocompleter.Base handles all the autocompletion functionality 
+// that's independent of the data source for autocompletion. This
+// includes drawing the autocompletion menu, observing keyboard
+// and mouse events, and similar.
+//
+// Specific autocompleters need to provide, at the very least, 
+// a getUpdatedChoices function that will be invoked every time
+// the text inside the monitored textbox changes. This method 
+// should get the text for which to provide autocompletion by
+// invoking this.getToken(), NOT by directly accessing
+// this.element.value. This is to allow incremental tokenized
+// autocompletion. Specific auto-completion logic (AJAX, etc)
+// belongs in getUpdatedChoices.
+//
+// Tokenized incremental autocompletion is enabled automatically
+// when an autocompleter is instantiated with the 'tokens' option
+// in the options parameter, e.g.:
+// new Ajax.Autocompleter('id','upd', '/url/', { tokens: ',' });
+// will incrementally autocomplete with a comma as the token.
+// Additionally, ',' in the above example can be replaced with
+// a token array, e.g. { tokens: [',', '\n'] } which
+// enables autocompletion on multiple tokens. This is most 
+// useful when one of the tokens is \n (a newline), as it 
+// allows smart autocompletion after linebreaks.
+
+var Autocompleter = {}
+Autocompleter.Base = function() {};
+Autocompleter.Base.prototype = {
+  baseInitialize: function(element, update, options) {
+    this.element     = $(element); 
+    this.update      = $(update);  
+    this.hasFocus    = false; 
+    this.changed     = false; 
+    this.active      = false; 
+    this.index       = 0;     
+    this.entryCount  = 0;
+
+    if (this.setOptions)
+      this.setOptions(options);
+    else
+      this.options = options || {};
+
+    this.options.paramName    = this.options.paramName || this.element.name;
+    this.options.tokens       = this.options.tokens || [];
+    this.options.frequency    = this.options.frequency || 0.4;
+    this.options.minChars     = this.options.minChars || 1;
+    this.options.onShow       = this.options.onShow || 
+    function(element, update){ 
+      if(!update.style.position || update.style.position=='absolute') {
+        update.style.position = 'absolute';
+        Position.clone(element, update, {setHeight: false, offsetTop: element.offsetHeight});
+      }
+      Effect.Appear(update,{duration:0.15});
+    };
+    this.options.onHide = this.options.onHide || 
+    function(element, update){ new Effect.Fade(update,{duration:0.15}) };
+
+    if (typeof(this.options.tokens) == 'string') 
+      this.options.tokens = new Array(this.options.tokens);
+
+    this.observer = null;
+    
+    this.element.setAttribute('autocomplete','off');
+
+    Element.hide(this.update);
+
+    Event.observe(this.element, "blur", this.onBlur.bindAsEventListener(this));
+    Event.observe(this.element, "keypress", this.onKeyPress.bindAsEventListener(this));
+  },
+
+  show: function() {
+    if(Element.getStyle(this.update, 'display')=='none') this.options.onShow(this.element, this.update);
+    if(!this.iefix && 
+      (navigator.appVersion.indexOf('MSIE')>0) &&
+      (navigator.userAgent.indexOf('Opera')<0) &&
+      (Element.getStyle(this.update, 'position')=='absolute')) {
+      new Insertion.After(this.update, 
+       '<iframe id="' + this.update.id + '_iefix" '+
+       'style="display:none;position:absolute;filter:progid:DXImageTransform.Microsoft.Alpha(opacity=0);" ' +
+       'src="javascript:false;" frameborder="0" scrolling="no"></iframe>');
+      this.iefix = $(this.update.id+'_iefix');
+    }
+    if(this.iefix) setTimeout(this.fixIEOverlapping.bind(this), 50);
+  },
+  
+  fixIEOverlapping: function() {
+    Position.clone(this.update, this.iefix);
+    this.iefix.style.zIndex = 1;
+    this.update.style.zIndex = 2;
+    Element.show(this.iefix);
+  },
+
+  hide: function() {
+    this.stopIndicator();
+    if(Element.getStyle(this.update, 'display')!='none') this.options.onHide(this.element, this.update);
+    if(this.iefix) Element.hide(this.iefix);
+  },
+
+  startIndicator: function() {
+    if(this.options.indicator) Element.show(this.options.indicator);
+  },
+
+  stopIndicator: function() {
+    if(this.options.indicator) Element.hide(this.options.indicator);
+  },
+
+  onKeyPress: function(event) {
+    if(this.active)
+      switch(event.keyCode) {
+       case Event.KEY_TAB:
+       case Event.KEY_RETURN:
+         this.selectEntry();
+         Event.stop(event);
+       case Event.KEY_ESC:
+         this.hide();
+         this.active = false;
+         Event.stop(event);
+         return;
+       case Event.KEY_LEFT:
+       case Event.KEY_RIGHT:
+         return;
+       case Event.KEY_UP:
+         this.markPrevious();
+         this.render();
+         if(navigator.appVersion.indexOf('AppleWebKit')>0) Event.stop(event);
+         return;
+       case Event.KEY_DOWN:
+         this.markNext();
+         this.render();
+         if(navigator.appVersion.indexOf('AppleWebKit')>0) Event.stop(event);
+         return;
+      }
+     else 
+       if(event.keyCode==Event.KEY_TAB || event.keyCode==Event.KEY_RETURN || 
+         (navigator.appVersion.indexOf('AppleWebKit') > 0 && event.keyCode == 0)) return;
+
+    this.changed = true;
+    this.hasFocus = true;
+
+    if(this.observer) clearTimeout(this.observer);
+      this.observer = 
+        setTimeout(this.onObserverEvent.bind(this), this.options.frequency*1000);
+  },
+
+  activate: function() {
+    this.changed = false;
+    this.hasFocus = true;
+    this.getUpdatedChoices();
+  },
+
+  onHover: function(event) {
+    var element = Event.findElement(event, 'LI');
+    if(this.index != element.autocompleteIndex) 
+    {
+        this.index = element.autocompleteIndex;
+        this.render();
+    }
+    Event.stop(event);
+  },
+  
+  onClick: function(event) {
+    var element = Event.findElement(event, 'LI');
+    this.index = element.autocompleteIndex;
+    this.selectEntry();
+    this.hide();
+  },
+  
+  onBlur: function(event) {
+    // needed to make click events working
+    setTimeout(this.hide.bind(this), 250);
+    this.hasFocus = false;
+    this.active = false;     
+  }, 
+  
+  render: function() {
+    if(this.entryCount > 0) {
+      for (var i = 0; i < this.entryCount; i++)
+        this.index==i ? 
+          Element.addClassName(this.getEntry(i),"selected") : 
+          Element.removeClassName(this.getEntry(i),"selected");
+        
+      if(this.hasFocus) { 
+        this.show();
+        this.active = true;
+      }
+    } else {
+      this.active = false;
+      this.hide();
+    }
+  },
+  
+  markPrevious: function() {
+    if(this.index > 0) this.index--
+      else this.index = this.entryCount-1;
+  },
+  
+  markNext: function() {
+    if(this.index < this.entryCount-1) this.index++
+      else this.index = 0;
+  },
+  
+  getEntry: function(index) {
+    return this.update.firstChild.childNodes[index];
+  },
+  
+  getCurrentEntry: function() {
+    return this.getEntry(this.index);
+  },
+  
+  selectEntry: function() {
+    this.active = false;
+    this.updateElement(this.getCurrentEntry());
+  },
+
+  updateElement: function(selectedElement) {
+    if (this.options.updateElement) {
+      this.options.updateElement(selectedElement);
+      return;
+    }
+    var value = '';
+    if (this.options.select) {
+      var nodes = document.getElementsByClassName(this.options.select, selectedElement) || [];
+      if(nodes.length>0) value = Element.collectTextNodes(nodes[0], this.options.select);
+    } else
+      value = Element.collectTextNodesIgnoreClass(selectedElement, 'informal');
+    
+    var lastTokenPos = this.findLastToken();
+    if (lastTokenPos != -1) {
+      var newValue = this.element.value.substr(0, lastTokenPos + 1);
+      var whitespace = this.element.value.substr(lastTokenPos + 1).match(/^\s+/);
+      if (whitespace)
+        newValue += whitespace[0];
+      this.element.value = newValue + value;
+    } else {
+      this.element.value = value;
+    }
+    this.element.focus();
+    
+    if (this.options.afterUpdateElement)
+      this.options.afterUpdateElement(this.element, selectedElement);
+  },
+
+  updateChoices: function(choices) {
+    if(!this.changed && this.hasFocus) {
+      this.update.innerHTML = choices;
+      Element.cleanWhitespace(this.update);
+      Element.cleanWhitespace(this.update.firstChild);
+
+      if(this.update.firstChild && this.update.firstChild.childNodes) {
+        this.entryCount = 
+          this.update.firstChild.childNodes.length;
+        for (var i = 0; i < this.entryCount; i++) {
+          var entry = this.getEntry(i);
+          entry.autocompleteIndex = i;
+          this.addObservers(entry);
+        }
+      } else { 
+        this.entryCount = 0;
+      }
+
+      this.stopIndicator();
+
+      this.index = 0;
+      this.render();
+    }
+  },
+
+  addObservers: function(element) {
+    Event.observe(element, "mouseover", this.onHover.bindAsEventListener(this));
+    Event.observe(element, "click", this.onClick.bindAsEventListener(this));
+  },
+
+  onObserverEvent: function() {
+    this.changed = false;   
+    if(this.getToken().length>=this.options.minChars) {
+      this.startIndicator();
+      this.getUpdatedChoices();
+    } else {
+      this.active = false;
+      this.hide();
+    }
+  },
+
+  getToken: function() {
+    var tokenPos = this.findLastToken();
+    if (tokenPos != -1)
+      var ret = this.element.value.substr(tokenPos + 1).replace(/^\s+/,'').replace(/\s+$/,'');
+    else
+      var ret = this.element.value;
+
+    return /\n/.test(ret) ? '' : ret;
+  },
+
+  findLastToken: function() {
+    var lastTokenPos = -1;
+
+    for (var i=0; i<this.options.tokens.length; i++) {
+      var thisTokenPos = this.element.value.lastIndexOf(this.options.tokens[i]);
+      if (thisTokenPos > lastTokenPos)
+        lastTokenPos = thisTokenPos;
+    }
+    return lastTokenPos;
+  }
+}
+
+Ajax.Autocompleter = Class.create();
+Object.extend(Object.extend(Ajax.Autocompleter.prototype, Autocompleter.Base.prototype), {
+  initialize: function(element, update, url, options) {
+    this.baseInitialize(element, update, options);
+    this.options.asynchronous  = true;
+    this.options.onComplete    = this.onComplete.bind(this);
+    this.options.defaultParams = this.options.parameters || null;
+    this.url                   = url;
+  },
+
+  getUpdatedChoices: function() {
+    entry = encodeURIComponent(this.options.paramName) + '=' + 
+      encodeURIComponent(this.getToken());
+
+    this.options.parameters = this.options.callback ?
+      this.options.callback(this.element, entry) : entry;
+
+    if(this.options.defaultParams) 
+      this.options.parameters += '&' + this.options.defaultParams;
+
+    new Ajax.Request(this.url, this.options);
+  },
+
+  onComplete: function(request) {
+    this.updateChoices(request.responseText);
+  }
+
+});
+
+// The local array autocompleter. Used when you'd prefer to
+// inject an array of autocompletion options into the page, rather
+// than sending out Ajax queries, which can be quite slow sometimes.
+//
+// The constructor takes four parameters. The first two are, as usual,
+// the id of the monitored textbox, and id of the autocompletion menu.
+// The third is the array you want to autocomplete from, and the fourth
+// is the options block.
+//
+// Extra local autocompletion options:
+// - choices - How many autocompletion choices to offer
+//
+// - partialSearch - If false, the autocompleter will match entered
+//                    text only at the beginning of strings in the 
+//                    autocomplete array. Defaults to true, which will
+//                    match text at the beginning of any *word* in the
+//                    strings in the autocomplete array. If you want to
+//                    search anywhere in the string, additionally set
+//                    the option fullSearch to true (default: off).
+//
+// - fullSsearch - Search anywhere in autocomplete array strings.
+//
+// - partialChars - How many characters to enter before triggering
+//                   a partial match (unlike minChars, which defines
+//                   how many characters are required to do any match
+//                   at all). Defaults to 2.
+//
+// - ignoreCase - Whether to ignore case when autocompleting.
+//                 Defaults to true.
+//
+// It's possible to pass in a custom function as the 'selector' 
+// option, if you prefer to write your own autocompletion logic.
+// In that case, the other options above will not apply unless
+// you support them.
+
+Autocompleter.Local = Class.create();
+Autocompleter.Local.prototype = Object.extend(new Autocompleter.Base(), {
+  initialize: function(element, update, array, options) {
+    this.baseInitialize(element, update, options);
+    this.options.array = array;
+  },
+
+  getUpdatedChoices: function() {
+    this.updateChoices(this.options.selector(this));
+  },
+
+  setOptions: function(options) {
+    this.options = Object.extend({
+      choices: 10,
+      partialSearch: true,
+      partialChars: 2,
+      ignoreCase: true,
+      fullSearch: false,
+      selector: function(instance) {
+        var ret       = []; // Beginning matches
+        var partial   = []; // Inside matches
+        var entry     = instance.getToken();
+        var count     = 0;
+
+        for (var i = 0; i < instance.options.array.length &&  
+          ret.length < instance.options.choices ; i++) { 
+
+          var elem = instance.options.array[i];
+          var foundPos = instance.options.ignoreCase ? 
+            elem.toLowerCase().indexOf(entry.toLowerCase()) : 
+            elem.indexOf(entry);
+
+          while (foundPos != -1) {
+            if (foundPos == 0 && elem.length != entry.length) { 
+              ret.push("<li><strong>" + elem.substr(0, entry.length) + "</strong>" + 
+                elem.substr(entry.length) + "</li>");
+              break;
+            } else if (entry.length >= instance.options.partialChars && 
+              instance.options.partialSearch && foundPos != -1) {
+              if (instance.options.fullSearch || /\s/.test(elem.substr(foundPos-1,1))) {
+                partial.push("<li>" + elem.substr(0, foundPos) + "<strong>" +
+                  elem.substr(foundPos, entry.length) + "</strong>" + elem.substr(
+                  foundPos + entry.length) + "</li>");
+                break;
+              }
+            }
+
+            foundPos = instance.options.ignoreCase ? 
+              elem.toLowerCase().indexOf(entry.toLowerCase(), foundPos + 1) : 
+              elem.indexOf(entry, foundPos + 1);
+
+          }
+        }
+        if (partial.length)
+          ret = ret.concat(partial.slice(0, instance.options.choices - ret.length))
+        return "<ul>" + ret.join('') + "</ul>";
+      }
+    }, options || {});
+  }
+});
+
+// AJAX in-place editor
+//
+// see documentation on http://wiki.script.aculo.us/scriptaculous/show/Ajax.InPlaceEditor
+
+// Use this if you notice weird scrolling problems on some browsers,
+// the DOM might be a bit confused when this gets called so do this
+// waits 1 ms (with setTimeout) until it does the activation
+Field.scrollFreeActivate = function(field) {
+  setTimeout(function() {
+    Field.activate(field);
+  }, 1);
+}
+
+Ajax.InPlaceEditor = Class.create();
+Ajax.InPlaceEditor.defaultHighlightColor = "#FFFF99";
+Ajax.InPlaceEditor.prototype = {
+  initialize: function(element, url, options) {
+    this.url = url;
+    this.element = $(element);
+
+    this.options = Object.extend({
+      okButton: true,
+      okText: "ok",
+      cancelLink: true,
+      cancelText: "cancel",
+      savingText: "Saving...",
+      clickToEditText: "Click to edit",
+      okText: "ok",
+      rows: 1,
+      onComplete: function(transport, element) {
+        new Effect.Highlight(element, {startcolor: this.options.highlightcolor});
+      },
+      onFailure: function(transport) {
+        alert("Error communicating with the server: " + transport.responseText.stripTags());
+      },
+      callback: function(form) {
+        return Form.serialize(form);
+      },
+      handleLineBreaks: true,
+      loadingText: 'Loading...',
+      savingClassName: 'inplaceeditor-saving',
+      loadingClassName: 'inplaceeditor-loading',
+      formClassName: 'inplaceeditor-form',
+      highlightcolor: Ajax.InPlaceEditor.defaultHighlightColor,
+      highlightendcolor: "#FFFFFF",
+      externalControl: null,
+      submitOnBlur: false,
+      ajaxOptions: {},
+      evalScripts: false
+    }, options || {});
+
+    if(!this.options.formId && this.element.id) {
+      this.options.formId = this.element.id + "-inplaceeditor";
+      if ($(this.options.formId)) {
+        // there's already a form with that name, don't specify an id
+        this.options.formId = null;
+      }
+    }
+    
+    if (this.options.externalControl) {
+      this.options.externalControl = $(this.options.externalControl);
+    }
+    
+    this.originalBackground = Element.getStyle(this.element, 'background-color');
+    if (!this.originalBackground) {
+      this.originalBackground = "transparent";
+    }
+    
+    this.element.title = this.options.clickToEditText;
+    
+    this.onclickListener = this.enterEditMode.bindAsEventListener(this);
+    this.mouseoverListener = this.enterHover.bindAsEventListener(this);
+    this.mouseoutListener = this.leaveHover.bindAsEventListener(this);
+    Event.observe(this.element, 'click', this.onclickListener);
+    Event.observe(this.element, 'mouseover', this.mouseoverListener);
+    Event.observe(this.element, 'mouseout', this.mouseoutListener);
+    if (this.options.externalControl) {
+      Event.observe(this.options.externalControl, 'click', this.onclickListener);
+      Event.observe(this.options.externalControl, 'mouseover', this.mouseoverListener);
+      Event.observe(this.options.externalControl, 'mouseout', this.mouseoutListener);
+    }
+  },
+  enterEditMode: function(evt) {
+    if (this.saving) return;
+    if (this.editing) return;
+    this.editing = true;
+    this.onEnterEditMode();
+    if (this.options.externalControl) {
+      Element.hide(this.options.externalControl);
+    }
+    Element.hide(this.element);
+    this.createForm();
+    this.element.parentNode.insertBefore(this.form, this.element);
+    Field.scrollFreeActivate(this.editField);
+    // stop the event to avoid a page refresh in Safari
+    if (evt) {
+      Event.stop(evt);
+    }
+    return false;
+  },
+  createForm: function() {
+    this.form = document.createElement("form");
+    this.form.id = this.options.formId;
+    Element.addClassName(this.form, this.options.formClassName)
+    this.form.onsubmit = this.onSubmit.bind(this);
+
+    this.createEditField();
+
+    if (this.options.textarea) {
+      var br = document.createElement("br");
+      this.form.appendChild(br);
+    }
+
+    if (this.options.okButton) {
+      okButton = document.createElement("input");
+      okButton.type = "submit";
+      okButton.value = this.options.okText;
+      okButton.className = 'editor_ok_button';
+      this.form.appendChild(okButton);
+    }
+
+    if (this.options.cancelLink) {
+      cancelLink = document.createElement("a");
+      cancelLink.href = "#";
+      cancelLink.appendChild(document.createTextNode(this.options.cancelText));
+      cancelLink.onclick = this.onclickCancel.bind(this);
+      cancelLink.className = 'editor_cancel';      
+      this.form.appendChild(cancelLink);
+    }
+  },
+  hasHTMLLineBreaks: function(string) {
+    if (!this.options.handleLineBreaks) return false;
+    return string.match(/<br/i) || string.match(/<p>/i);
+  },
+  convertHTMLLineBreaks: function(string) {
+    return string.replace(/<br>/gi, "\n").replace(/<br\/>/gi, "\n").replace(/<\/p>/gi, "\n").replace(/<p>/gi, "");
+  },
+  createEditField: function() {
+    var text;
+    if(this.options.loadTextURL) {
+      text = this.options.loadingText;
+    } else {
+      text = this.getText();
+    }
+
+    var obj = this;
+    
+    if (this.options.rows == 1 && !this.hasHTMLLineBreaks(text)) {
+      this.options.textarea = false;
+      var textField = document.createElement("input");
+      textField.obj = this;
+      textField.type = "text";
+      textField.name = "value";
+      textField.value = text;
+      textField.style.backgroundColor = this.options.highlightcolor;
+      textField.className = 'editor_field';
+      var size = this.options.size || this.options.cols || 0;
+      if (size != 0) textField.size = size;
+      if (this.options.submitOnBlur)
+        textField.onblur = this.onSubmit.bind(this);
+      this.editField = textField;
+    } else {
+      this.options.textarea = true;
+      var textArea = document.createElement("textarea");
+      textArea.obj = this;
+      textArea.name = "value";
+      textArea.value = this.convertHTMLLineBreaks(text);
+      textArea.rows = this.options.rows;
+      textArea.cols = this.options.cols || 40;
+      textArea.className = 'editor_field';      
+      if (this.options.submitOnBlur)
+        textArea.onblur = this.onSubmit.bind(this);
+      this.editField = textArea;
+    }
+    
+    if(this.options.loadTextURL) {
+      this.loadExternalText();
+    }
+    this.form.appendChild(this.editField);
+  },
+  getText: function() {
+    return this.element.innerHTML;
+  },
+  loadExternalText: function() {
+    Element.addClassName(this.form, this.options.loadingClassName);
+    this.editField.disabled = true;
+    new Ajax.Request(
+      this.options.loadTextURL,
+      Object.extend({
+        asynchronous: true,
+        onComplete: this.onLoadedExternalText.bind(this)
+      }, this.options.ajaxOptions)
+    );
+  },
+  onLoadedExternalText: function(transport) {
+    Element.removeClassName(this.form, this.options.loadingClassName);
+    this.editField.disabled = false;
+    this.editField.value = transport.responseText.stripTags();
+  },
+  onclickCancel: function() {
+    this.onComplete();
+    this.leaveEditMode();
+    return false;
+  },
+  onFailure: function(transport) {
+    this.options.onFailure(transport);
+    if (this.oldInnerHTML) {
+      this.element.innerHTML = this.oldInnerHTML;
+      this.oldInnerHTML = null;
+    }
+    return false;
+  },
+  onSubmit: function() {
+    // onLoading resets these so we need to save them away for the Ajax call
+    var form = this.form;
+    var value = this.editField.value;
+    
+    // do this first, sometimes the ajax call returns before we get a chance to switch on Saving...
+    // which means this will actually switch on Saving... *after* we've left edit mode causing Saving...
+    // to be displayed indefinitely
+    this.onLoading();
+    
+    if (this.options.evalScripts) {
+      new Ajax.Request(
+        this.url, Object.extend({
+          parameters: this.options.callback(form, value),
+          onComplete: this.onComplete.bind(this),
+          onFailure: this.onFailure.bind(this),
+          asynchronous:true, 
+          evalScripts:true
+        }, this.options.ajaxOptions));
+    } else  {
+      new Ajax.Updater(
+        { success: this.element,
+          // don't update on failure (this could be an option)
+          failure: null }, 
+        this.url, Object.extend({
+          parameters: this.options.callback(form, value),
+          onComplete: this.onComplete.bind(this),
+          onFailure: this.onFailure.bind(this)
+        }, this.options.ajaxOptions));
+    }
+    // stop the event to avoid a page refresh in Safari
+    if (arguments.length > 1) {
+      Event.stop(arguments[0]);
+    }
+    return false;
+  },
+  onLoading: function() {
+    this.saving = true;
+    this.removeForm();
+    this.leaveHover();
+    this.showSaving();
+  },
+  showSaving: function() {
+    this.oldInnerHTML = this.element.innerHTML;
+    this.element.innerHTML = this.options.savingText;
+    Element.addClassName(this.element, this.options.savingClassName);
+    this.element.style.backgroundColor = this.originalBackground;
+    Element.show(this.element);
+  },
+  removeForm: function() {
+    if(this.form) {
+      if (this.form.parentNode) Element.remove(this.form);
+      this.form = null;
+    }
+  },
+  enterHover: function() {
+    if (this.saving) return;
+    this.element.style.backgroundColor = this.options.highlightcolor;
+    if (this.effect) {
+      this.effect.cancel();
+    }
+    Element.addClassName(this.element, this.options.hoverClassName)
+  },
+  leaveHover: function() {
+    if (this.options.backgroundColor) {
+      this.element.style.backgroundColor = this.oldBackground;
+    }
+    Element.removeClassName(this.element, this.options.hoverClassName)
+    if (this.saving) return;
+    this.effect = new Effect.Highlight(this.element, {
+      startcolor: this.options.highlightcolor,
+      endcolor: this.options.highlightendcolor,
+      restorecolor: this.originalBackground
+    });
+  },
+  leaveEditMode: function() {
+    Element.removeClassName(this.element, this.options.savingClassName);
+    this.removeForm();
+    this.leaveHover();
+    this.element.style.backgroundColor = this.originalBackground;
+    Element.show(this.element);
+    if (this.options.externalControl) {
+      Element.show(this.options.externalControl);
+    }
+    this.editing = false;
+    this.saving = false;
+    this.oldInnerHTML = null;
+    this.onLeaveEditMode();
+  },
+  onComplete: function(transport) {
+    this.leaveEditMode();
+    this.options.onComplete.bind(this)(transport, this.element);
+  },
+  onEnterEditMode: function() {},
+  onLeaveEditMode: function() {},
+  dispose: function() {
+    if (this.oldInnerHTML) {
+      this.element.innerHTML = this.oldInnerHTML;
+    }
+    this.leaveEditMode();
+    Event.stopObserving(this.element, 'click', this.onclickListener);
+    Event.stopObserving(this.element, 'mouseover', this.mouseoverListener);
+    Event.stopObserving(this.element, 'mouseout', this.mouseoutListener);
+    if (this.options.externalControl) {
+      Event.stopObserving(this.options.externalControl, 'click', this.onclickListener);
+      Event.stopObserving(this.options.externalControl, 'mouseover', this.mouseoverListener);
+      Event.stopObserving(this.options.externalControl, 'mouseout', this.mouseoutListener);
+    }
+  }
+};
+
+Ajax.InPlaceCollectionEditor = Class.create();
+Object.extend(Ajax.InPlaceCollectionEditor.prototype, Ajax.InPlaceEditor.prototype);
+Object.extend(Ajax.InPlaceCollectionEditor.prototype, {
+  createEditField: function() {
+    if (!this.cached_selectTag) {
+      var selectTag = document.createElement("select");
+      var collection = this.options.collection || [];
+      var optionTag;
+      collection.each(function(e,i) {
+        optionTag = document.createElement("option");
+        optionTag.value = (e instanceof Array) ? e[0] : e;
+        if(this.options.value==optionTag.value) optionTag.selected = true;
+        optionTag.appendChild(document.createTextNode((e instanceof Array) ? e[1] : e));
+        selectTag.appendChild(optionTag);
+      }.bind(this));
+      this.cached_selectTag = selectTag;
+    }
+
+    this.editField = this.cached_selectTag;
+    if(this.options.loadTextURL) this.loadExternalText();
+    this.form.appendChild(this.editField);
+    this.options.callback = function(form, value) {
+      return "value=" + encodeURIComponent(value);
+    }
+  }
+});
+
+// Delayed observer, like Form.Element.Observer, 
+// but waits for delay after last key input
+// Ideal for live-search fields
+
+Form.Element.DelayedObserver = Class.create();
+Form.Element.DelayedObserver.prototype = {
+  initialize: function(element, delay, callback) {
+    this.delay     = delay || 0.5;
+    this.element   = $(element);
+    this.callback  = callback;
+    this.timer     = null;
+    this.lastValue = $F(this.element); 
+    Event.observe(this.element,'keyup',this.delayedListener.bindAsEventListener(this));
+  },
+  delayedListener: function(event) {
+    if(this.lastValue == $F(this.element)) return;
+    if(this.timer) clearTimeout(this.timer);
+    this.timer = setTimeout(this.onTimerEvent.bind(this), this.delay * 1000);
+    this.lastValue = $F(this.element);
+  },
+  onTimerEvent: function() {
+    this.timer = null;
+    this.callback(this.element, $F(this.element));
+  }
+};
diff --git a/public/javascripts/dragdrop.js b/public/javascripts/dragdrop.js
new file mode 100644
index 0000000..a01b7be
--- /dev/null
+++ b/public/javascripts/dragdrop.js
@@ -0,0 +1,913 @@
+// Copyright (c) 2005 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
+//           (c) 2005 Sammi Williams (http://www.oriontransfer.co.nz, sammi@oriontransfer.co.nz)
+// 
+// See scriptaculous.js for full license.
+
+/*--------------------------------------------------------------------------*/
+
+var Droppables = {
+  drops: [],
+
+  remove: function(element) {
+    this.drops = this.drops.reject(function(d) { return d.element==$(element) });
+  },
+
+  add: function(element) {
+    element = $(element);
+    var options = Object.extend({
+      greedy:     true,
+      hoverclass: null,
+      tree:       false
+    }, arguments[1] || {});
+
+    // cache containers
+    if(options.containment) {
+      options._containers = [];
+      var containment = options.containment;
+      if((typeof containment == 'object') && 
+        (containment.constructor == Array)) {
+        containment.each( function(c) { options._containers.push($(c)) });
+      } else {
+        options._containers.push($(containment));
+      }
+    }
+    
+    if(options.accept) options.accept = [options.accept].flatten();
+
+    Element.makePositioned(element); // fix IE
+    options.element = element;
+
+    this.drops.push(options);
+  },
+  
+  findDeepestChild: function(drops) {
+    deepest = drops[0];
+      
+    for (i = 1; i < drops.length; ++i)
+      if (Element.isParent(drops[i].element, deepest.element))
+        deepest = drops[i];
+    
+    return deepest;
+  },
+
+  isContained: function(element, drop) {
+    var containmentNode;
+    if(drop.tree) {
+      containmentNode = element.treeNode; 
+    } else {
+      containmentNode = element.parentNode;
+    }
+    return drop._containers.detect(function(c) { return containmentNode == c });
+  },
+  
+  isAffected: function(point, element, drop) {
+    return (
+      (drop.element!=element) &&
+      ((!drop._containers) ||
+        this.isContained(element, drop)) &&
+      ((!drop.accept) ||
+        (Element.classNames(element).detect( 
+          function(v) { return drop.accept.include(v) } ) )) &&
+      Position.within(drop.element, point[0], point[1]) );
+  },
+
+  deactivate: function(drop) {
+    if(drop.hoverclass)
+      Element.removeClassName(drop.element, drop.hoverclass);
+    this.last_active = null;
+  },
+
+  activate: function(drop) {
+    if(drop.hoverclass)
+      Element.addClassName(drop.element, drop.hoverclass);
+    this.last_active = drop;
+  },
+
+  show: function(point, element) {
+    if(!this.drops.length) return;
+    var affected = [];
+    
+    if(this.last_active) this.deactivate(this.last_active);
+    this.drops.each( function(drop) {
+      if(Droppables.isAffected(point, element, drop))
+        affected.push(drop);
+    });
+        
+    if(affected.length>0) {
+      drop = Droppables.findDeepestChild(affected);
+      Position.within(drop.element, point[0], point[1]);
+      if(drop.onHover)
+        drop.onHover(element, drop.element, Position.overlap(drop.overlap, drop.element));
+      
+      Droppables.activate(drop);
+    }
+  },
+
+  fire: function(event, element) {
+    if(!this.last_active) return;
+    Position.prepare();
+
+    if (this.isAffected([Event.pointerX(event), Event.pointerY(event)], element, this.last_active))
+      if (this.last_active.onDrop) 
+        this.last_active.onDrop(element, this.last_active.element, event);
+  },
+
+  reset: function() {
+    if(this.last_active)
+      this.deactivate(this.last_active);
+  }
+}
+
+var Draggables = {
+  drags: [],
+  observers: [],
+  
+  register: function(draggable) {
+    if(this.drags.length == 0) {
+      this.eventMouseUp   = this.endDrag.bindAsEventListener(this);
+      this.eventMouseMove = this.updateDrag.bindAsEventListener(this);
+      this.eventKeypress  = this.keyPress.bindAsEventListener(this);
+      
+      Event.observe(document, "mouseup", this.eventMouseUp);
+      Event.observe(document, "mousemove", this.eventMouseMove);
+      Event.observe(document, "keypress", this.eventKeypress);
+    }
+    this.drags.push(draggable);
+  },
+  
+  unregister: function(draggable) {
+    this.drags = this.drags.reject(function(d) { return d==draggable });
+    if(this.drags.length == 0) {
+      Event.stopObserving(document, "mouseup", this.eventMouseUp);
+      Event.stopObserving(document, "mousemove", this.eventMouseMove);
+      Event.stopObserving(document, "keypress", this.eventKeypress);
+    }
+  },
+  
+  activate: function(draggable) {
+    window.focus(); // allows keypress events if window isn't currently focused, fails for Safari
+    this.activeDraggable = draggable;
+  },
+  
+  deactivate: function() {
+    this.activeDraggable = null;
+  },
+  
+  updateDrag: function(event) {
+    if(!this.activeDraggable) return;
+    var pointer = [Event.pointerX(event), Event.pointerY(event)];
+    // Mozilla-based browsers fire successive mousemove events with
+    // the same coordinates, prevent needless redrawing (moz bug?)
+    if(this._lastPointer && (this._lastPointer.inspect() == pointer.inspect())) return;
+    this._lastPointer = pointer;
+    this.activeDraggable.updateDrag(event, pointer);
+  },
+  
+  endDrag: function(event) {
+    if(!this.activeDraggable) return;
+    this._lastPointer = null;
+    this.activeDraggable.endDrag(event);
+    this.activeDraggable = null;
+  },
+  
+  keyPress: function(event) {
+    if(this.activeDraggable)
+      this.activeDraggable.keyPress(event);
+  },
+  
+  addObserver: function(observer) {
+    this.observers.push(observer);
+    this._cacheObserverCallbacks();
+  },
+  
+  removeObserver: function(element) {  // element instead of observer fixes mem leaks
+    this.observers = this.observers.reject( function(o) { return o.element==element });
+    this._cacheObserverCallbacks();
+  },
+  
+  notify: function(eventName, draggable, event) {  // 'onStart', 'onEnd', 'onDrag'
+    if(this[eventName+'Count'] > 0)
+      this.observers.each( function(o) {
+        if(o[eventName]) o[eventName](eventName, draggable, event);
+      });
+  },
+  
+  _cacheObserverCallbacks: function() {
+    ['onStart','onEnd','onDrag'].each( function(eventName) {
+      Draggables[eventName+'Count'] = Draggables.observers.select(
+        function(o) { return o[eventName]; }
+      ).length;
+    });
+  }
+}
+
+/*--------------------------------------------------------------------------*/
+
+var Draggable = Class.create();
+Draggable.prototype = {
+  initialize: function(element) {
+    var options = Object.extend({
+      handle: false,
+      starteffect: function(element) { 
+        new Effect.Opacity(element, {duration:0.2, from:1.0, to:0.7}); 
+      },
+      reverteffect: function(element, top_offset, left_offset) {
+        var dur = Math.sqrt(Math.abs(top_offset^2)+Math.abs(left_offset^2))*0.02;
+        element._revert = new Effect.Move(element, { x: -left_offset, y: -top_offset, duration: dur});
+      },
+      endeffect: function(element) { 
+        new Effect.Opacity(element, {duration:0.2, from:0.7, to:1.0}); 
+      },
+      zindex: 1000,
+      revert: false,
+      scroll: false,
+      scrollSensitivity: 20,
+      scrollSpeed: 15,
+      snap: false   // false, or xy or [x,y] or function(x,y){ return [x,y] }
+    }, arguments[1] || {});
+
+    this.element = $(element);
+    
+    if(options.handle && (typeof options.handle == 'string')) {
+      var h = Element.childrenWithClassName(this.element, options.handle, true);
+      if(h.length>0) this.handle = h[0];
+    }
+    if(!this.handle) this.handle = $(options.handle);
+    if(!this.handle) this.handle = this.element;
+    
+    if(options.scroll && !options.scroll.scrollTo && !options.scroll.outerHTML)
+      options.scroll = $(options.scroll);
+
+    Element.makePositioned(this.element); // fix IE    
+
+    this.delta    = this.currentDelta();
+    this.options  = options;
+    this.dragging = false;   
+
+    this.eventMouseDown = this.initDrag.bindAsEventListener(this);
+    Event.observe(this.handle, "mousedown", this.eventMouseDown);
+    
+    Draggables.register(this);
+  },
+  
+  destroy: function() {
+    Event.stopObserving(this.handle, "mousedown", this.eventMouseDown);
+    Draggables.unregister(this);
+  },
+  
+  currentDelta: function() {
+    return([
+      parseInt(Element.getStyle(this.element,'left') || '0'),
+      parseInt(Element.getStyle(this.element,'top') || '0')]);
+  },
+  
+  initDrag: function(event) {
+    if(Event.isLeftClick(event)) {    
+      // abort on form elements, fixes a Firefox issue
+      var src = Event.element(event);
+      if(src.tagName && (
+        src.tagName=='INPUT' ||
+        src.tagName=='SELECT' ||
+        src.tagName=='OPTION' ||
+        src.tagName=='BUTTON' ||
+        src.tagName=='TEXTAREA')) return;
+        
+      if(this.element._revert) {
+        this.element._revert.cancel();
+        this.element._revert = null;
+      }
+      
+      var pointer = [Event.pointerX(event), Event.pointerY(event)];
+      var pos     = Position.cumulativeOffset(this.element);
+      this.offset = [0,1].map( function(i) { return (pointer[i] - pos[i]) });
+      
+      Draggables.activate(this);
+      Event.stop(event);
+    }
+  },
+  
+  startDrag: function(event) {
+    this.dragging = true;
+    
+    if(this.options.zindex) {
+      this.originalZ = parseInt(Element.getStyle(this.element,'z-index') || 0);
+      this.element.style.zIndex = this.options.zindex;
+    }
+    
+    if(this.options.ghosting) {
+      this._clone = this.element.cloneNode(true);
+      Position.absolutize(this.element);
+      this.element.parentNode.insertBefore(this._clone, this.element);
+    }
+    
+    if(this.options.scroll) {
+      if (this.options.scroll == window) {
+        var where = this._getWindowScroll(this.options.scroll);
+        this.originalScrollLeft = where.left;
+        this.originalScrollTop = where.top;
+      } else {
+        this.originalScrollLeft = this.options.scroll.scrollLeft;
+        this.originalScrollTop = this.options.scroll.scrollTop;
+      }
+    }
+    
+    Draggables.notify('onStart', this, event);
+    if(this.options.starteffect) this.options.starteffect(this.element);
+  },
+  
+  updateDrag: function(event, pointer) {
+    if(!this.dragging) this.startDrag(event);
+    Position.prepare();
+    Droppables.show(pointer, this.element);
+    Draggables.notify('onDrag', this, event);
+    this.draw(pointer);
+    if(this.options.change) this.options.change(this);
+    
+    if(this.options.scroll) {
+      this.stopScrolling();
+      
+      var p;
+      if (this.options.scroll == window) {
+        with(this._getWindowScroll(this.options.scroll)) { p = [ left, top, left+width, top+height ]; }
+      } else {
+        p = Position.page(this.options.scroll);
+        p[0] += this.options.scroll.scrollLeft;
+        p[1] += this.options.scroll.scrollTop;
+        p.push(p[0]+this.options.scroll.offsetWidth);
+        p.push(p[1]+this.options.scroll.offsetHeight);
+      }
+      var speed = [0,0];
+      if(pointer[0] < (p[0]+this.options.scrollSensitivity)) speed[0] = pointer[0]-(p[0]+this.options.scrollSensitivity);
+      if(pointer[1] < (p[1]+this.options.scrollSensitivity)) speed[1] = pointer[1]-(p[1]+this.options.scrollSensitivity);
+      if(pointer[0] > (p[2]-this.options.scrollSensitivity)) speed[0] = pointer[0]-(p[2]-this.options.scrollSensitivity);
+      if(pointer[1] > (p[3]-this.options.scrollSensitivity)) speed[1] = pointer[1]-(p[3]-this.options.scrollSensitivity);
+      this.startScrolling(speed);
+    }
+    
+    // fix AppleWebKit rendering
+    if(navigator.appVersion.indexOf('AppleWebKit')>0) window.scrollBy(0,0);
+    
+    Event.stop(event);
+  },
+  
+  finishDrag: function(event, success) {
+    this.dragging = false;
+
+    if(this.options.ghosting) {
+      Position.relativize(this.element);
+      Element.remove(this._clone);
+      this._clone = null;
+    }
+
+    if(success) Droppables.fire(event, this.element);
+    Draggables.notify('onEnd', this, event);
+
+    var revert = this.options.revert;
+    if(revert && typeof revert == 'function') revert = revert(this.element);
+    
+    var d = this.currentDelta();
+    if(revert && this.options.reverteffect) {
+      this.options.reverteffect(this.element, 
+        d[1]-this.delta[1], d[0]-this.delta[0]);
+    } else {
+      this.delta = d;
+    }
+
+    if(this.options.zindex)
+      this.element.style.zIndex = this.originalZ;
+
+    if(this.options.endeffect) 
+      this.options.endeffect(this.element);
+
+    Draggables.deactivate(this);
+    Droppables.reset();
+  },
+  
+  keyPress: function(event) {
+    if(event.keyCode!=Event.KEY_ESC) return;
+    this.finishDrag(event, false);
+    Event.stop(event);
+  },
+  
+  endDrag: function(event) {
+    if(!this.dragging) return;
+    this.stopScrolling();
+    this.finishDrag(event, true);
+    Event.stop(event);
+  },
+  
+  draw: function(point) {
+    var pos = Position.cumulativeOffset(this.element);
+    var d = this.currentDelta();
+    pos[0] -= d[0]; pos[1] -= d[1];
+    
+    if(this.options.scroll && (this.options.scroll != window)) {
+      pos[0] -= this.options.scroll.scrollLeft-this.originalScrollLeft;
+      pos[1] -= this.options.scroll.scrollTop-this.originalScrollTop;
+    }
+    
+    var p = [0,1].map(function(i){ 
+      return (point[i]-pos[i]-this.offset[i]) 
+    }.bind(this));
+    
+    if(this.options.snap) {
+      if(typeof this.options.snap == 'function') {
+        p = this.options.snap(p[0],p[1]);
+      } else {
+      if(this.options.snap instanceof Array) {
+        p = p.map( function(v, i) {
+          return Math.round(v/this.options.snap[i])*this.options.snap[i] }.bind(this))
+      } else {
+        p = p.map( function(v) {
+          return Math.round(v/this.options.snap)*this.options.snap }.bind(this))
+      }
+    }}
+    
+    var style = this.element.style;
+    if((!this.options.constraint) || (this.options.constraint=='horizontal'))
+      style.left = p[0] + "px";
+    if((!this.options.constraint) || (this.options.constraint=='vertical'))
+      style.top  = p[1] + "px";
+    if(style.visibility=="hidden") style.visibility = ""; // fix gecko rendering
+  },
+  
+  stopScrolling: function() {
+    if(this.scrollInterval) {
+      clearInterval(this.scrollInterval);
+      this.scrollInterval = null;
+      Draggables._lastScrollPointer = null;
+    }
+  },
+  
+  startScrolling: function(speed) {
+    this.scrollSpeed = [speed[0]*this.options.scrollSpeed,speed[1]*this.options.scrollSpeed];
+    this.lastScrolled = new Date();
+    this.scrollInterval = setInterval(this.scroll.bind(this), 10);
+  },
+  
+  scroll: function() {
+    var current = new Date();
+    var delta = current - this.lastScrolled;
+    this.lastScrolled = current;
+    if(this.options.scroll == window) {
+      with (this._getWindowScroll(this.options.scroll)) {
+        if (this.scrollSpeed[0] || this.scrollSpeed[1]) {
+          var d = delta / 1000;
+          this.options.scroll.scrollTo( left + d*this.scrollSpeed[0], top + d*this.scrollSpeed[1] );
+        }
+      }
+    } else {
+      this.options.scroll.scrollLeft += this.scrollSpeed[0] * delta / 1000;
+      this.options.scroll.scrollTop  += this.scrollSpeed[1] * delta / 1000;
+    }
+    
+    Position.prepare();
+    Droppables.show(Draggables._lastPointer, this.element);
+    Draggables.notify('onDrag', this);
+    Draggables._lastScrollPointer = Draggables._lastScrollPointer || $A(Draggables._lastPointer);
+    Draggables._lastScrollPointer[0] += this.scrollSpeed[0] * delta / 1000;
+    Draggables._lastScrollPointer[1] += this.scrollSpeed[1] * delta / 1000;
+    if (Draggables._lastScrollPointer[0] < 0)
+      Draggables._lastScrollPointer[0] = 0;
+    if (Draggables._lastScrollPointer[1] < 0)
+      Draggables._lastScrollPointer[1] = 0;
+    this.draw(Draggables._lastScrollPointer);
+    
+    if(this.options.change) this.options.change(this);
+  },
+  
+  _getWindowScroll: function(w) {
+    var T, L, W, H;
+    with (w.document) {
+      if (w.document.documentElement && documentElement.scrollTop) {
+        T = documentElement.scrollTop;
+        L = documentElement.scrollLeft;
+      } else if (w.document.body) {
+        T = body.scrollTop;
+        L = body.scrollLeft;
+      }
+      if (w.innerWidth) {
+        W = w.innerWidth;
+        H = w.innerHeight;
+      } else if (w.document.documentElement && documentElement.clientWidth) {
+        W = documentElement.clientWidth;
+        H = documentElement.clientHeight;
+      } else {
+        W = body.offsetWidth;
+        H = body.offsetHeight
+      }
+    }
+    return { top: T, left: L, width: W, height: H };
+  }
+}
+
+/*--------------------------------------------------------------------------*/
+
+var SortableObserver = Class.create();
+SortableObserver.prototype = {
+  initialize: function(element, observer) {
+    this.element   = $(element);
+    this.observer  = observer;
+    this.lastValue = Sortable.serialize(this.element);
+  },
+  
+  onStart: function() {
+    this.lastValue = Sortable.serialize(this.element);
+  },
+  
+  onEnd: function() {
+    Sortable.unmark();
+    if(this.lastValue != Sortable.serialize(this.element))
+      this.observer(this.element)
+  }
+}
+
+var Sortable = {
+  sortables: {},
+  
+  _findRootElement: function(element) {
+    while (element.tagName != "BODY") {  
+      if(element.id && Sortable.sortables[element.id]) return element;
+      element = element.parentNode;
+    }
+  },
+
+  options: function(element) {
+    element = Sortable._findRootElement($(element));
+    if(!element) return;
+    return Sortable.sortables[element.id];
+  },
+  
+  destroy: function(element){
+    var s = Sortable.options(element);
+    
+    if(s) {
+      Draggables.removeObserver(s.element);
+      s.droppables.each(function(d){ Droppables.remove(d) });
+      s.draggables.invoke('destroy');
+      
+      delete Sortable.sortables[s.element.id];
+    }
+  },
+
+  create: function(element) {
+    element = $(element);
+    var options = Object.extend({ 
+      element:     element,
+      tag:         'li',       // assumes li children, override with tag: 'tagname'
+      dropOnEmpty: false,
+      tree:        false,
+      treeTag:     'ul',
+      overlap:     'vertical', // one of 'vertical', 'horizontal'
+      constraint:  'vertical', // one of 'vertical', 'horizontal', false
+      containment: element,    // also takes array of elements (or id's); or false
+      handle:      false,      // or a CSS class
+      only:        false,
+      hoverclass:  null,
+      ghosting:    false,
+      scroll:      false,
+      scrollSensitivity: 20,
+      scrollSpeed: 15,
+      format:      /^[^_]*_(.*)$/,
+      onChange:    Prototype.emptyFunction,
+      onUpdate:    Prototype.emptyFunction
+    }, arguments[1] || {});
+
+    // clear any old sortable with same element
+    this.destroy(element);
+
+    // build options for the draggables
+    var options_for_draggable = {
+      revert:      true,
+      scroll:      options.scroll,
+      scrollSpeed: options.scrollSpeed,
+      scrollSensitivity: options.scrollSensitivity,
+      ghosting:    options.ghosting,
+      constraint:  options.constraint,
+      handle:      options.handle };
+
+    if(options.starteffect)
+      options_for_draggable.starteffect = options.starteffect;
+
+    if(options.reverteffect)
+      options_for_draggable.reverteffect = options.reverteffect;
+    else
+      if(options.ghosting) options_for_draggable.reverteffect = function(element) {
+        element.style.top  = 0;
+        element.style.left = 0;
+      };
+
+    if(options.endeffect)
+      options_for_draggable.endeffect = options.endeffect;
+
+    if(options.zindex)
+      options_for_draggable.zindex = options.zindex;
+
+    // build options for the droppables  
+    var options_for_droppable = {
+      overlap:     options.overlap,
+      containment: options.containment,
+      tree:        options.tree,
+      hoverclass:  options.hoverclass,
+      onHover:     Sortable.onHover
+      //greedy:      !options.dropOnEmpty
+    }
+    
+    var options_for_tree = {
+      onHover:      Sortable.onEmptyHover,
+      overlap:      options.overlap,
+      containment:  options.containment,
+      hoverclass:   options.hoverclass
+    }
+
+    // fix for gecko engine
+    Element.cleanWhitespace(element); 
+
+    options.draggables = [];
+    options.droppables = [];
+
+    // drop on empty handling
+    if(options.dropOnEmpty || options.tree) {
+      Droppables.add(element, options_for_tree);
+      options.droppables.push(element);
+    }
+
+    (this.findElements(element, options) || []).each( function(e) {
+      // handles are per-draggable
+      var handle = options.handle ? 
+        Element.childrenWithClassName(e, options.handle)[0] : e;    
+      options.draggables.push(
+        new Draggable(e, Object.extend(options_for_draggable, { handle: handle })));
+      Droppables.add(e, options_for_droppable);
+      if(options.tree) e.treeNode = element;
+      options.droppables.push(e);      
+    });
+    
+    if(options.tree) {
+      (Sortable.findTreeElements(element, options) || []).each( function(e) {
+        Droppables.add(e, options_for_tree);
+        e.treeNode = element;
+        options.droppables.push(e);
+      });
+    }
+
+    // keep reference
+    this.sortables[element.id] = options;
+
+    // for onupdate
+    Draggables.addObserver(new SortableObserver(element, options.onUpdate));
+
+  },
+
+  // return all suitable-for-sortable elements in a guaranteed order
+  findElements: function(element, options) {
+    return Element.findChildren(
+      element, options.only, options.tree ? true : false, options.tag);
+  },
+  
+  findTreeElements: function(element, options) {
+    return Element.findChildren(
+      element, options.only, options.tree ? true : false, options.treeTag);
+  },
+
+  onHover: function(element, dropon, overlap) {
+    if(Element.isParent(dropon, element)) return;
+
+    if(overlap > .33 && overlap < .66 && Sortable.options(dropon).tree) {
+      return;
+    } else if(overlap>0.5) {
+      Sortable.mark(dropon, 'before');
+      if(dropon.previousSibling != element) {
+        var oldParentNode = element.parentNode;
+        element.style.visibility = "hidden"; // fix gecko rendering
+        dropon.parentNode.insertBefore(element, dropon);
+        if(dropon.parentNode!=oldParentNode) 
+          Sortable.options(oldParentNode).onChange(element);
+        Sortable.options(dropon.parentNode).onChange(element);
+      }
+    } else {
+      Sortable.mark(dropon, 'after');
+      var nextElement = dropon.nextSibling || null;
+      if(nextElement != element) {
+        var oldParentNode = element.parentNode;
+        element.style.visibility = "hidden"; // fix gecko rendering
+        dropon.parentNode.insertBefore(element, nextElement);
+        if(dropon.parentNode!=oldParentNode) 
+          Sortable.options(oldParentNode).onChange(element);
+        Sortable.options(dropon.parentNode).onChange(element);
+      }
+    }
+  },
+  
+  onEmptyHover: function(element, dropon, overlap) {
+    var oldParentNode = element.parentNode;
+    var droponOptions = Sortable.options(dropon);
+        
+    if(!Element.isParent(dropon, element)) {
+      var index;
+      
+      var children = Sortable.findElements(dropon, {tag: droponOptions.tag});
+      var child = null;
+            
+      if(children) {
+        var offset = Element.offsetSize(dropon, droponOptions.overlap) * (1.0 - overlap);
+        
+        for (index = 0; index < children.length; index += 1) {
+          if (offset - Element.offsetSize (children[index], droponOptions.overlap) >= 0) {
+            offset -= Element.offsetSize (children[index], droponOptions.overlap);
+          } else if (offset - (Element.offsetSize (children[index], droponOptions.overlap) / 2) >= 0) {
+            child = index + 1 < children.length ? children[index + 1] : null;
+            break;
+          } else {
+            child = children[index];
+            break;
+          }
+        }
+      }
+      
+      dropon.insertBefore(element, child);
+      
+      Sortable.options(oldParentNode).onChange(element);
+      droponOptions.onChange(element);
+    }
+  },
+
+  unmark: function() {
+    if(Sortable._marker) Element.hide(Sortable._marker);
+  },
+
+  mark: function(dropon, position) {
+    // mark on ghosting only
+    var sortable = Sortable.options(dropon.parentNode);
+    if(sortable && !sortable.ghosting) return; 
+
+    if(!Sortable._marker) {
+      Sortable._marker = $('dropmarker') || document.createElement('DIV');
+      Element.hide(Sortable._marker);
+      Element.addClassName(Sortable._marker, 'dropmarker');
+      Sortable._marker.style.position = 'absolute';
+      document.getElementsByTagName("body").item(0).appendChild(Sortable._marker);
+    }    
+    var offsets = Position.cumulativeOffset(dropon);
+    Sortable._marker.style.left = offsets[0] + 'px';
+    Sortable._marker.style.top = offsets[1] + 'px';
+    
+    if(position=='after')
+      if(sortable.overlap == 'horizontal') 
+        Sortable._marker.style.left = (offsets[0]+dropon.clientWidth) + 'px';
+      else
+        Sortable._marker.style.top = (offsets[1]+dropon.clientHeight) + 'px';
+    
+    Element.show(Sortable._marker);
+  },
+  
+  _tree: function(element, options, parent) {
+    var children = Sortable.findElements(element, options) || [];
+  
+    for (var i = 0; i < children.length; ++i) {
+      var match = children[i].id.match(options.format);
+
+      if (!match) continue;
+      
+      var child = {
+        id: encodeURIComponent(match ? match[1] : null),
+        element: element,
+        parent: parent,
+        children: new Array,
+        position: parent.children.length,
+        container: Sortable._findChildrenElement(children[i], options.treeTag.toUpperCase())
+      }
+      
+      /* Get the element containing the children and recurse over it */
+      if (child.container)
+        this._tree(child.container, options, child)
+      
+      parent.children.push (child);
+    }
+
+    return parent; 
+  },
+
+  /* Finds the first element of the given tag type within a parent element.
+    Used for finding the first LI[ST] within a L[IST]I[TEM].*/
+  _findChildrenElement: function (element, containerTag) {
+    if (element && element.hasChildNodes)
+      for (var i = 0; i < element.childNodes.length; ++i)
+        if (element.childNodes[i].tagName == containerTag)
+          return element.childNodes[i];
+  
+    return null;
+  },
+
+  tree: function(element) {
+    element = $(element);
+    var sortableOptions = this.options(element);
+    var options = Object.extend({
+      tag: sortableOptions.tag,
+      treeTag: sortableOptions.treeTag,
+      only: sortableOptions.only,
+      name: element.id,
+      format: sortableOptions.format
+    }, arguments[1] || {});
+    
+    var root = {
+      id: null,
+      parent: null,
+      children: new Array,
+      container: element,
+      position: 0
+    }
+    
+    return Sortable._tree (element, options, root);
+  },
+
+  /* Construct a [i] index for a particular node */
+  _constructIndex: function(node) {
+    var index = '';
+    do {
+      if (node.id) index = '[' + node.position + ']' + index;
+    } while ((node = node.parent) != null);
+    return index;
+  },
+
+  sequence: function(element) {
+    element = $(element);
+    var options = Object.extend(this.options(element), arguments[1] || {});
+    
+    return $(this.findElements(element, options) || []).map( function(item) {
+      return item.id.match(options.format) ? item.id.match(options.format)[1] : '';
+    });
+  },
+
+  setSequence: function(element, new_sequence) {
+    element = $(element);
+    var options = Object.extend(this.options(element), arguments[2] || {});
+    
+    var nodeMap = {};
+    this.findElements(element, options).each( function(n) {
+        if (n.id.match(options.format))
+            nodeMap[n.id.match(options.format)[1]] = [n, n.parentNode];
+        n.parentNode.removeChild(n);
+    });
+   
+    new_sequence.each(function(ident) {
+      var n = nodeMap[ident];
+      if (n) {
+        n[1].appendChild(n[0]);
+        delete nodeMap[ident];
+      }
+    });
+  },
+  
+  serialize: function(element) {
+    element = $(element);
+    var options = Object.extend(Sortable.options(element), arguments[1] || {});
+    var name = encodeURIComponent(
+      (arguments[1] && arguments[1].name) ? arguments[1].name : element.id);
+    
+    if (options.tree) {
+      return Sortable.tree(element, arguments[1]).children.map( function (item) {
+        return [name + Sortable._constructIndex(item) + "=" + 
+                encodeURIComponent(item.id)].concat(item.children.map(arguments.callee));
+      }).flatten().join('&');
+    } else {
+      return Sortable.sequence(element, arguments[1]).map( function(item) {
+        return name + "[]=" + encodeURIComponent(item);
+      }).join('&');
+    }
+  }
+}
+
+/* Returns true if child is contained within element */
+Element.isParent = function(child, element) {
+  if (!child.parentNode || child == element) return false;
+
+  if (child.parentNode == element) return true;
+
+  return Element.isParent(child.parentNode, element);
+}
+
+Element.findChildren = function(element, only, recursive, tagName) {    
+  if(!element.hasChildNodes()) return null;
+  tagName = tagName.toUpperCase();
+  if(only) only = [only].flatten();
+  var elements = [];
+  $A(element.childNodes).each( function(e) {
+    if(e.tagName && e.tagName.toUpperCase()==tagName &&
+      (!only || (Element.classNames(e).detect(function(v) { return only.include(v) }))))
+        elements.push(e);
+    if(recursive) {
+      var grandchildren = Element.findChildren(e, only, recursive, tagName);
+      if(grandchildren) elements.push(grandchildren);
+    }
+  });
+
+  return (elements.length>0 ? elements.flatten() : []);
+}
+
+Element.offsetSize = function (element, type) {
+  if (type == 'vertical' || type == 'height')
+    return element.offsetHeight;
+  else
+    return element.offsetWidth;
+}
\ No newline at end of file
diff --git a/public/javascripts/effects.js b/public/javascripts/effects.js
new file mode 100644
index 0000000..9274005
--- /dev/null
+++ b/public/javascripts/effects.js
@@ -0,0 +1,958 @@
+// Copyright (c) 2005 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
+// Contributors:
+//  Justin Palmer (http://encytemedia.com/)
+//  Mark Pilgrim (http://diveintomark.org/)
+//  Martin Bialasinki
+// 
+// See scriptaculous.js for full license.  
+
+// converts rgb() and #xxx to #xxxxxx format,  
+// returns self (or first argument) if not convertable  
+String.prototype.parseColor = function() {  
+  var color = '#';  
+  if(this.slice(0,4) == 'rgb(') {  
+    var cols = this.slice(4,this.length-1).split(',');  
+    var i=0; do { color += parseInt(cols[i]).toColorPart() } while (++i<3);  
+  } else {  
+    if(this.slice(0,1) == '#') {  
+      if(this.length==4) for(var i=1;i<4;i++) color += (this.charAt(i) + this.charAt(i)).toLowerCase();  
+      if(this.length==7) color = this.toLowerCase();  
+    }  
+  }  
+  return(color.length==7 ? color : (arguments[0] || this));  
+}
+
+/*--------------------------------------------------------------------------*/
+
+Element.collectTextNodes = function(element) {  
+  return $A($(element).childNodes).collect( function(node) {
+    return (node.nodeType==3 ? node.nodeValue : 
+      (node.hasChildNodes() ? Element.collectTextNodes(node) : ''));
+  }).flatten().join('');
+}
+
+Element.collectTextNodesIgnoreClass = function(element, className) {  
+  return $A($(element).childNodes).collect( function(node) {
+    return (node.nodeType==3 ? node.nodeValue : 
+      ((node.hasChildNodes() && !Element.hasClassName(node,className)) ? 
+        Element.collectTextNodesIgnoreClass(node, className) : ''));
+  }).flatten().join('');
+}
+
+Element.setContentZoom = function(element, percent) {
+  element = $(element);  
+  Element.setStyle(element, {fontSize: (percent/100) + 'em'});   
+  if(navigator.appVersion.indexOf('AppleWebKit')>0) window.scrollBy(0,0);
+}
+
+Element.getOpacity = function(element){  
+  var opacity;
+  if (opacity = Element.getStyle(element, 'opacity'))  
+    return parseFloat(opacity);  
+  if (opacity = (Element.getStyle(element, 'filter') || '').match(/alpha\(opacity=(.*)\)/))  
+    if(opacity[1]) return parseFloat(opacity[1]) / 100;  
+  return 1.0;  
+}
+
+Element.setOpacity = function(element, value){  
+  element= $(element);  
+  if (value == 1){
+    Element.setStyle(element, { opacity: 
+      (/Gecko/.test(navigator.userAgent) && !/Konqueror|Safari|KHTML/.test(navigator.userAgent)) ? 
+      0.999999 : null });
+    if(/MSIE/.test(navigator.userAgent))  
+      Element.setStyle(element, {filter: Element.getStyle(element,'filter').replace(/alpha\([^\)]*\)/gi,'')});  
+  } else {  
+    if(value < 0.00001) value = 0;  
+    Element.setStyle(element, {opacity: value});
+    if(/MSIE/.test(navigator.userAgent))  
+     Element.setStyle(element, 
+       { filter: Element.getStyle(element,'filter').replace(/alpha\([^\)]*\)/gi,'') +
+                 'alpha(opacity='+value*100+')' });  
+  }
+}  
+ 
+Element.getInlineOpacity = function(element){  
+  return $(element).style.opacity || '';
+}  
+
+Element.childrenWithClassName = function(element, className, findFirst) {
+  var classNameRegExp = new RegExp("(^|\\s)" + className + "(\\s|$)");
+  var results = $A($(element).getElementsByTagName('*'))[findFirst ? 'detect' : 'select']( function(c) { 
+    return (c.className && c.className.match(classNameRegExp));
+  });
+  if(!results) results = [];
+  return results;
+}
+
+Element.forceRerendering = function(element) {
+  try {
+    element = $(element);
+    var n = document.createTextNode(' ');
+    element.appendChild(n);
+    element.removeChild(n);
+  } catch(e) { }
+};
+
+/*--------------------------------------------------------------------------*/
+
+Array.prototype.call = function() {
+  var args = arguments;
+  this.each(function(f){ f.apply(this, args) });
+}
+
+/*--------------------------------------------------------------------------*/
+
+var Effect = {
+  tagifyText: function(element) {
+    var tagifyStyle = 'position:relative';
+    if(/MSIE/.test(navigator.userAgent)) tagifyStyle += ';zoom:1';
+    element = $(element);
+    $A(element.childNodes).each( function(child) {
+      if(child.nodeType==3) {
+        child.nodeValue.toArray().each( function(character) {
+          element.insertBefore(
+            Builder.node('span',{style: tagifyStyle},
+              character == ' ' ? String.fromCharCode(160) : character), 
+              child);
+        });
+        Element.remove(child);
+      }
+    });
+  },
+  multiple: function(element, effect) {
+    var elements;
+    if(((typeof element == 'object') || 
+        (typeof element == 'function')) && 
+       (element.length))
+      elements = element;
+    else
+      elements = $(element).childNodes;
+      
+    var options = Object.extend({
+      speed: 0.1,
+      delay: 0.0
+    }, arguments[2] || {});
+    var masterDelay = options.delay;
+
+    $A(elements).each( function(element, index) {
+      new effect(element, Object.extend(options, { delay: index * options.speed + masterDelay }));
+    });
+  },
+  PAIRS: {
+    'slide':  ['SlideDown','SlideUp'],
+    'blind':  ['BlindDown','BlindUp'],
+    'appear': ['Appear','Fade']
+  },
+  toggle: function(element, effect) {
+    element = $(element);
+    effect = (effect || 'appear').toLowerCase();
+    var options = Object.extend({
+      queue: { position:'end', scope:(element.id || 'global'), limit: 1 }
+    }, arguments[2] || {});
+    Effect[element.visible() ? 
+      Effect.PAIRS[effect][1] : Effect.PAIRS[effect][0]](element, options);
+  }
+};
+
+var Effect2 = Effect; // deprecated
+
+/* ------------- transitions ------------- */
+
+Effect.Transitions = {}
+
+Effect.Transitions.linear = function(pos) {
+  return pos;
+}
+Effect.Transitions.sinoidal = function(pos) {
+  return (-Math.cos(pos*Math.PI)/2) + 0.5;
+}
+Effect.Transitions.reverse  = function(pos) {
+  return 1-pos;
+}
+Effect.Transitions.flicker = function(pos) {
+  return ((-Math.cos(pos*Math.PI)/4) + 0.75) + Math.random()/4;
+}
+Effect.Transitions.wobble = function(pos) {
+  return (-Math.cos(pos*Math.PI*(9*pos))/2) + 0.5;
+}
+Effect.Transitions.pulse = function(pos) {
+  return (Math.floor(pos*10) % 2 == 0 ? 
+    (pos*10-Math.floor(pos*10)) : 1-(pos*10-Math.floor(pos*10)));
+}
+Effect.Transitions.none = function(pos) {
+  return 0;
+}
+Effect.Transitions.full = function(pos) {
+  return 1;
+}
+
+/* ------------- core effects ------------- */
+
+Effect.ScopedQueue = Class.create();
+Object.extend(Object.extend(Effect.ScopedQueue.prototype, Enumerable), {
+  initialize: function() {
+    this.effects  = [];
+    this.interval = null;
+  },
+  _each: function(iterator) {
+    this.effects._each(iterator);
+  },
+  add: function(effect) {
+    var timestamp = new Date().getTime();
+    
+    var position = (typeof effect.options.queue == 'string') ? 
+      effect.options.queue : effect.options.queue.position;
+    
+    switch(position) {
+      case 'front':
+        // move unstarted effects after this effect  
+        this.effects.findAll(function(e){ return e.state=='idle' }).each( function(e) {
+            e.startOn  += effect.finishOn;
+            e.finishOn += effect.finishOn;
+          });
+        break;
+      case 'end':
+        // start effect after last queued effect has finished
+        timestamp = this.effects.pluck('finishOn').max() || timestamp;
+        break;
+    }
+    
+    effect.startOn  += timestamp;
+    effect.finishOn += timestamp;
+
+    if(!effect.options.queue.limit || (this.effects.length < effect.options.queue.limit))
+      this.effects.push(effect);
+    
+    if(!this.interval) 
+      this.interval = setInterval(this.loop.bind(this), 40);
+  },
+  remove: function(effect) {
+    this.effects = this.effects.reject(function(e) { return e==effect });
+    if(this.effects.length == 0) {
+      clearInterval(this.interval);
+      this.interval = null;
+    }
+  },
+  loop: function() {
+    var timePos = new Date().getTime();
+    this.effects.invoke('loop', timePos);
+  }
+});
+
+Effect.Queues = {
+  instances: $H(),
+  get: function(queueName) {
+    if(typeof queueName != 'string') return queueName;
+    
+    if(!this.instances[queueName])
+      this.instances[queueName] = new Effect.ScopedQueue();
+      
+    return this.instances[queueName];
+  }
+}
+Effect.Queue = Effect.Queues.get('global');
+
+Effect.DefaultOptions = {
+  transition: Effect.Transitions.sinoidal,
+  duration:   1.0,   // seconds
+  fps:        25.0,  // max. 25fps due to Effect.Queue implementation
+  sync:       false, // true for combining
+  from:       0.0,
+  to:         1.0,
+  delay:      0.0,
+  queue:      'parallel'
+}
+
+Effect.Base = function() {};
+Effect.Base.prototype = {
+  position: null,
+  start: function(options) {
+    this.options      = Object.extend(Object.extend({},Effect.DefaultOptions), options || {});
+    this.currentFrame = 0;
+    this.state        = 'idle';
+    this.startOn      = this.options.delay*1000;
+    this.finishOn     = this.startOn + (this.options.duration*1000);
+    this.event('beforeStart');
+    if(!this.options.sync)
+      Effect.Queues.get(typeof this.options.queue == 'string' ? 
+        'global' : this.options.queue.scope).add(this);
+  },
+  loop: function(timePos) {
+    if(timePos >= this.startOn) {
+      if(timePos >= this.finishOn) {
+        this.render(1.0);
+        this.cancel();
+        this.event('beforeFinish');
+        if(this.finish) this.finish(); 
+        this.event('afterFinish');
+        return;  
+      }
+      var pos   = (timePos - this.startOn) / (this.finishOn - this.startOn);
+      var frame = Math.round(pos * this.options.fps * this.options.duration);
+      if(frame > this.currentFrame) {
+        this.render(pos);
+        this.currentFrame = frame;
+      }
+    }
+  },
+  render: function(pos) {
+    if(this.state == 'idle') {
+      this.state = 'running';
+      this.event('beforeSetup');
+      if(this.setup) this.setup();
+      this.event('afterSetup');
+    }
+    if(this.state == 'running') {
+      if(this.options.transition) pos = this.options.transition(pos);
+      pos *= (this.options.to-this.options.from);
+      pos += this.options.from;
+      this.position = pos;
+      this.event('beforeUpdate');
+      if(this.update) this.update(pos);
+      this.event('afterUpdate');
+    }
+  },
+  cancel: function() {
+    if(!this.options.sync)
+      Effect.Queues.get(typeof this.options.queue == 'string' ? 
+        'global' : this.options.queue.scope).remove(this);
+    this.state = 'finished';
+  },
+  event: function(eventName) {
+    if(this.options[eventName + 'Internal']) this.options[eventName + 'Internal'](this);
+    if(this.options[eventName]) this.options[eventName](this);
+  },
+  inspect: function() {
+    return '#<Effect:' + $H(this).inspect() + ',options:' + $H(this.options).inspect() + '>';
+  }
+}
+
+Effect.Parallel = Class.create();
+Object.extend(Object.extend(Effect.Parallel.prototype, Effect.Base.prototype), {
+  initialize: function(effects) {
+    this.effects = effects || [];
+    this.start(arguments[1]);
+  },
+  update: function(position) {
+    this.effects.invoke('render', position);
+  },
+  finish: function(position) {
+    this.effects.each( function(effect) {
+      effect.render(1.0);
+      effect.cancel();
+      effect.event('beforeFinish');
+      if(effect.finish) effect.finish(position);
+      effect.event('afterFinish');
+    });
+  }
+});
+
+Effect.Opacity = Class.create();
+Object.extend(Object.extend(Effect.Opacity.prototype, Effect.Base.prototype), {
+  initialize: function(element) {
+    this.element = $(element);
+    // make this work on IE on elements without 'layout'
+    if(/MSIE/.test(navigator.userAgent) && (!this.element.hasLayout))
+      this.element.setStyle({zoom: 1});
+    var options = Object.extend({
+      from: this.element.getOpacity() || 0.0,
+      to:   1.0
+    }, arguments[1] || {});
+    this.start(options);
+  },
+  update: function(position) {
+    this.element.setOpacity(position);
+  }
+});
+
+Effect.Move = Class.create();
+Object.extend(Object.extend(Effect.Move.prototype, Effect.Base.prototype), {
+  initialize: function(element) {
+    this.element = $(element);
+    var options = Object.extend({
+      x:    0,
+      y:    0,
+      mode: 'relative'
+    }, arguments[1] || {});
+    this.start(options);
+  },
+  setup: function() {
+    // Bug in Opera: Opera returns the "real" position of a static element or
+    // relative element that does not have top/left explicitly set.
+    // ==> Always set top and left for position relative elements in your stylesheets 
+    // (to 0 if you do not need them) 
+    this.element.makePositioned();
+    this.originalLeft = parseFloat(this.element.getStyle('left') || '0');
+    this.originalTop  = parseFloat(this.element.getStyle('top')  || '0');
+    if(this.options.mode == 'absolute') {
+      // absolute movement, so we need to calc deltaX and deltaY
+      this.options.x = this.options.x - this.originalLeft;
+      this.options.y = this.options.y - this.originalTop;
+    }
+  },
+  update: function(position) {
+    this.element.setStyle({
+      left: this.options.x  * position + this.originalLeft + 'px',
+      top:  this.options.y  * position + this.originalTop  + 'px'
+    });
+  }
+});
+
+// for backwards compatibility
+Effect.MoveBy = function(element, toTop, toLeft) {
+  return new Effect.Move(element, 
+    Object.extend({ x: toLeft, y: toTop }, arguments[3] || {}));
+};
+
+Effect.Scale = Class.create();
+Object.extend(Object.extend(Effect.Scale.prototype, Effect.Base.prototype), {
+  initialize: function(element, percent) {
+    this.element = $(element)
+    var options = Object.extend({
+      scaleX: true,
+      scaleY: true,
+      scaleContent: true,
+      scaleFromCenter: false,
+      scaleMode: 'box',        // 'box' or 'contents' or {} with provided values
+      scaleFrom: 100.0,
+      scaleTo:   percent
+    }, arguments[2] || {});
+    this.start(options);
+  },
+  setup: function() {
+    this.restoreAfterFinish = this.options.restoreAfterFinish || false;
+    this.elementPositioning = this.element.getStyle('position');
+    
+    this.originalStyle = {};
+    ['top','left','width','height','fontSize'].each( function(k) {
+      this.originalStyle[k] = this.element.style[k];
+    }.bind(this));
+      
+    this.originalTop  = this.element.offsetTop;
+    this.originalLeft = this.element.offsetLeft;
+    
+    var fontSize = this.element.getStyle('font-size') || '100%';
+    ['em','px','%'].each( function(fontSizeType) {
+      if(fontSize.indexOf(fontSizeType)>0) {
+        this.fontSize     = parseFloat(fontSize);
+        this.fontSizeType = fontSizeType;
+      }
+    }.bind(this));
+    
+    this.factor = (this.options.scaleTo - this.options.scaleFrom)/100;
+    
+    this.dims = null;
+    if(this.options.scaleMode=='box')
+      this.dims = [this.element.offsetHeight, this.element.offsetWidth];
+    if(/^content/.test(this.options.scaleMode))
+      this.dims = [this.element.scrollHeight, this.element.scrollWidth];
+    if(!this.dims)
+      this.dims = [this.options.scaleMode.originalHeight,
+                   this.options.scaleMode.originalWidth];
+  },
+  update: function(position) {
+    var currentScale = (this.options.scaleFrom/100.0) + (this.factor * position);
+    if(this.options.scaleContent && this.fontSize)
+      this.element.setStyle({fontSize: this.fontSize * currentScale + this.fontSizeType });
+    this.setDimensions(this.dims[0] * currentScale, this.dims[1] * currentScale);
+  },
+  finish: function(position) {
+    if (this.restoreAfterFinish) this.element.setStyle(this.originalStyle);
+  },
+  setDimensions: function(height, width) {
+    var d = {};
+    if(this.options.scaleX) d.width = width + 'px';
+    if(this.options.scaleY) d.height = height + 'px';
+    if(this.options.scaleFromCenter) {
+      var topd  = (height - this.dims[0])/2;
+      var leftd = (width  - this.dims[1])/2;
+      if(this.elementPositioning == 'absolute') {
+        if(this.options.scaleY) d.top = this.originalTop-topd + 'px';
+        if(this.options.scaleX) d.left = this.originalLeft-leftd + 'px';
+      } else {
+        if(this.options.scaleY) d.top = -topd + 'px';
+        if(this.options.scaleX) d.left = -leftd + 'px';
+      }
+    }
+    this.element.setStyle(d);
+  }
+});
+
+Effect.Highlight = Class.create();
+Object.extend(Object.extend(Effect.Highlight.prototype, Effect.Base.prototype), {
+  initialize: function(element) {
+    this.element = $(element);
+    var options = Object.extend({ startcolor: '#ffff99' }, arguments[1] || {});
+    this.start(options);
+  },
+  setup: function() {
+    // Prevent executing on elements not in the layout flow
+    if(this.element.getStyle('display')=='none') { this.cancel(); return; }
+    // Disable background image during the effect
+    this.oldStyle = {
+      backgroundImage: this.element.getStyle('background-image') };
+    this.element.setStyle({backgroundImage: 'none'});
+    if(!this.options.endcolor)
+      this.options.endcolor = this.element.getStyle('background-color').parseColor('#ffffff');
+    if(!this.options.restorecolor)
+      this.options.restorecolor = this.element.getStyle('background-color');
+    // init color calculations
+    this._base  = $R(0,2).map(function(i){ return parseInt(this.options.startcolor.slice(i*2+1,i*2+3),16) }.bind(this));
+    this._delta = $R(0,2).map(function(i){ return parseInt(this.options.endcolor.slice(i*2+1,i*2+3),16)-this._base[i] }.bind(this));
+  },
+  update: function(position) {
+    this.element.setStyle({backgroundColor: $R(0,2).inject('#',function(m,v,i){
+      return m+(Math.round(this._base[i]+(this._delta[i]*position)).toColorPart()); }.bind(this)) });
+  },
+  finish: function() {
+    this.element.setStyle(Object.extend(this.oldStyle, {
+      backgroundColor: this.options.restorecolor
+    }));
+  }
+});
+
+Effect.ScrollTo = Class.create();
+Object.extend(Object.extend(Effect.ScrollTo.prototype, Effect.Base.prototype), {
+  initialize: function(element) {
+    this.element = $(element);
+    this.start(arguments[1] || {});
+  },
+  setup: function() {
+    Position.prepare();
+    var offsets = Position.cumulativeOffset(this.element);
+    if(this.options.offset) offsets[1] += this.options.offset;
+    var max = window.innerHeight ? 
+      window.height - window.innerHeight :
+      document.body.scrollHeight - 
+        (document.documentElement.clientHeight ? 
+          document.documentElement.clientHeight : document.body.clientHeight);
+    this.scrollStart = Position.deltaY;
+    this.delta = (offsets[1] > max ? max : offsets[1]) - this.scrollStart;
+  },
+  update: function(position) {
+    Position.prepare();
+    window.scrollTo(Position.deltaX, 
+      this.scrollStart + (position*this.delta));
+  }
+});
+
+/* ------------- combination effects ------------- */
+
+Effect.Fade = function(element) {
+  element = $(element);
+  var oldOpacity = element.getInlineOpacity();
+  var options = Object.extend({
+  from: element.getOpacity() || 1.0,
+  to:   0.0,
+  afterFinishInternal: function(effect) { 
+    if(effect.options.to!=0) return;
+    effect.element.hide();
+    effect.element.setStyle({opacity: oldOpacity}); 
+  }}, arguments[1] || {});
+  return new Effect.Opacity(element,options);
+}
+
+Effect.Appear = function(element) {
+  element = $(element);
+  var options = Object.extend({
+  from: (element.getStyle('display') == 'none' ? 0.0 : element.getOpacity() || 0.0),
+  to:   1.0,
+  // force Safari to render floated elements properly
+  afterFinishInternal: function(effect) {
+    effect.element.forceRerendering();
+  },
+  beforeSetup: function(effect) {
+    effect.element.setOpacity(effect.options.from);
+    effect.element.show(); 
+  }}, arguments[1] || {});
+  return new Effect.Opacity(element,options);
+}
+
+Effect.Puff = function(element) {
+  element = $(element);
+  var oldStyle = { opacity: element.getInlineOpacity(), position: element.getStyle('position') };
+  return new Effect.Parallel(
+   [ new Effect.Scale(element, 200, 
+      { sync: true, scaleFromCenter: true, scaleContent: true, restoreAfterFinish: true }), 
+     new Effect.Opacity(element, { sync: true, to: 0.0 } ) ], 
+     Object.extend({ duration: 1.0, 
+      beforeSetupInternal: function(effect) {
+        effect.effects[0].element.setStyle({position: 'absolute'}); },
+      afterFinishInternal: function(effect) {
+         effect.effects[0].element.hide();
+         effect.effects[0].element.setStyle(oldStyle); }
+     }, arguments[1] || {})
+   );
+}
+
+Effect.BlindUp = function(element) {
+  element = $(element);
+  element.makeClipping();
+  return new Effect.Scale(element, 0, 
+    Object.extend({ scaleContent: false, 
+      scaleX: false, 
+      restoreAfterFinish: true,
+      afterFinishInternal: function(effect) {
+        effect.element.hide();
+        effect.element.undoClipping();
+      } 
+    }, arguments[1] || {})
+  );
+}
+
+Effect.BlindDown = function(element) {
+  element = $(element);
+  var elementDimensions = element.getDimensions();
+  return new Effect.Scale(element, 100, 
+    Object.extend({ scaleContent: false, 
+      scaleX: false,
+      scaleFrom: 0,
+      scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
+      restoreAfterFinish: true,
+      afterSetup: function(effect) {
+        effect.element.makeClipping();
+        effect.element.setStyle({height: '0px'});
+        effect.element.show(); 
+      },  
+      afterFinishInternal: function(effect) {
+        effect.element.undoClipping();
+      }
+    }, arguments[1] || {})
+  );
+}
+
+Effect.SwitchOff = function(element) {
+  element = $(element);
+  var oldOpacity = element.getInlineOpacity();
+  return new Effect.Appear(element, { 
+    duration: 0.4,
+    from: 0,
+    transition: Effect.Transitions.flicker,
+    afterFinishInternal: function(effect) {
+      new Effect.Scale(effect.element, 1, { 
+        duration: 0.3, scaleFromCenter: true,
+        scaleX: false, scaleContent: false, restoreAfterFinish: true,
+        beforeSetup: function(effect) { 
+          effect.element.makePositioned();
+          effect.element.makeClipping();
+        },
+        afterFinishInternal: function(effect) {
+          effect.element.hide();
+          effect.element.undoClipping();
+          effect.element.undoPositioned();
+          effect.element.setStyle({opacity: oldOpacity});
+        }
+      })
+    }
+  });
+}
+
+Effect.DropOut = function(element) {
+  element = $(element);
+  var oldStyle = {
+    top: element.getStyle('top'),
+    left: element.getStyle('left'),
+    opacity: element.getInlineOpacity() };
+  return new Effect.Parallel(
+    [ new Effect.Move(element, {x: 0, y: 100, sync: true }), 
+      new Effect.Opacity(element, { sync: true, to: 0.0 }) ],
+    Object.extend(
+      { duration: 0.5,
+        beforeSetup: function(effect) {
+          effect.effects[0].element.makePositioned(); 
+        },
+        afterFinishInternal: function(effect) {
+          effect.effects[0].element.hide();
+          effect.effects[0].element.undoPositioned();
+          effect.effects[0].element.setStyle(oldStyle);
+        } 
+      }, arguments[1] || {}));
+}
+
+Effect.Shake = function(element) {
+  element = $(element);
+  var oldStyle = {
+    top: element.getStyle('top'),
+    left: element.getStyle('left') };
+    return new Effect.Move(element, 
+      { x:  20, y: 0, duration: 0.05, afterFinishInternal: function(effect) {
+    new Effect.Move(effect.element,
+      { x: -40, y: 0, duration: 0.1,  afterFinishInternal: function(effect) {
+    new Effect.Move(effect.element,
+      { x:  40, y: 0, duration: 0.1,  afterFinishInternal: function(effect) {
+    new Effect.Move(effect.element,
+      { x: -40, y: 0, duration: 0.1,  afterFinishInternal: function(effect) {
+    new Effect.Move(effect.element,
+      { x:  40, y: 0, duration: 0.1,  afterFinishInternal: function(effect) {
+    new Effect.Move(effect.element,
+      { x: -20, y: 0, duration: 0.05, afterFinishInternal: function(effect) {
+        effect.element.undoPositioned();
+        effect.element.setStyle(oldStyle);
+  }}) }}) }}) }}) }}) }});
+}
+
+Effect.SlideDown = function(element) {
+  element = $(element);
+  element.cleanWhitespace();
+  // SlideDown need to have the content of the element wrapped in a container element with fixed height!
+  var oldInnerBottom = $(element.firstChild).getStyle('bottom');
+  var elementDimensions = element.getDimensions();
+  return new Effect.Scale(element, 100, Object.extend({ 
+    scaleContent: false, 
+    scaleX: false, 
+    scaleFrom: 0,
+    scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
+    restoreAfterFinish: true,
+    afterSetup: function(effect) {
+      effect.element.makePositioned();
+      effect.element.firstChild.makePositioned();
+      if(window.opera) effect.element.setStyle({top: ''});
+      effect.element.makeClipping();
+      effect.element.setStyle({height: '0px'});
+      effect.element.show(); },
+    afterUpdateInternal: function(effect) {
+      effect.element.firstChild.setStyle({bottom:
+        (effect.dims[0] - effect.element.clientHeight) + 'px' }); 
+    },
+    afterFinishInternal: function(effect) {
+      effect.element.undoClipping(); 
+      // IE will crash if child is undoPositioned first
+      if(/MSIE/.test(navigator.userAgent)){
+        effect.element.undoPositioned();
+        effect.element.firstChild.undoPositioned();
+      }else{
+        effect.element.firstChild.undoPositioned();
+        effect.element.undoPositioned();
+      }
+      effect.element.firstChild.setStyle({bottom: oldInnerBottom}); }
+    }, arguments[1] || {})
+  );
+}
+  
+Effect.SlideUp = function(element) {
+  element = $(element);
+  element.cleanWhitespace();
+  var oldInnerBottom = $(element.firstChild).getStyle('bottom');
+  return new Effect.Scale(element, 0, 
+   Object.extend({ scaleContent: false, 
+    scaleX: false, 
+    scaleMode: 'box',
+    scaleFrom: 100,
+    restoreAfterFinish: true,
+    beforeStartInternal: function(effect) {
+      effect.element.makePositioned();
+      effect.element.firstChild.makePositioned();
+      if(window.opera) effect.element.setStyle({top: ''});
+      effect.element.makeClipping();
+      effect.element.show(); },  
+    afterUpdateInternal: function(effect) {
+      effect.element.firstChild.setStyle({bottom:
+        (effect.dims[0] - effect.element.clientHeight) + 'px' }); },
+    afterFinishInternal: function(effect) {
+      effect.element.hide();
+      effect.element.undoClipping();
+      effect.element.firstChild.undoPositioned();
+      effect.element.undoPositioned();
+      effect.element.setStyle({bottom: oldInnerBottom}); }
+   }, arguments[1] || {})
+  );
+}
+
+// Bug in opera makes the TD containing this element expand for a instance after finish 
+Effect.Squish = function(element) {
+  return new Effect.Scale(element, window.opera ? 1 : 0, 
+    { restoreAfterFinish: true,
+      beforeSetup: function(effect) {
+        effect.element.makeClipping(effect.element); },  
+      afterFinishInternal: function(effect) {
+        effect.element.hide(effect.element); 
+        effect.element.undoClipping(effect.element); }
+  });
+}
+
+Effect.Grow = function(element) {
+  element = $(element);
+  var options = Object.extend({
+    direction: 'center',
+    moveTransition: Effect.Transitions.sinoidal,
+    scaleTransition: Effect.Transitions.sinoidal,
+    opacityTransition: Effect.Transitions.full
+  }, arguments[1] || {});
+  var oldStyle = {
+    top: element.style.top,
+    left: element.style.left,
+    height: element.style.height,
+    width: element.style.width,
+    opacity: element.getInlineOpacity() };
+
+  var dims = element.getDimensions();    
+  var initialMoveX, initialMoveY;
+  var moveX, moveY;
+  
+  switch (options.direction) {
+    case 'top-left':
+      initialMoveX = initialMoveY = moveX = moveY = 0; 
+      break;
+    case 'top-right':
+      initialMoveX = dims.width;
+      initialMoveY = moveY = 0;
+      moveX = -dims.width;
+      break;
+    case 'bottom-left':
+      initialMoveX = moveX = 0;
+      initialMoveY = dims.height;
+      moveY = -dims.height;
+      break;
+    case 'bottom-right':
+      initialMoveX = dims.width;
+      initialMoveY = dims.height;
+      moveX = -dims.width;
+      moveY = -dims.height;
+      break;
+    case 'center':
+      initialMoveX = dims.width / 2;
+      initialMoveY = dims.height / 2;
+      moveX = -dims.width / 2;
+      moveY = -dims.height / 2;
+      break;
+  }
+  
+  return new Effect.Move(element, {
+    x: initialMoveX,
+    y: initialMoveY,
+    duration: 0.01, 
+    beforeSetup: function(effect) {
+      effect.element.hide();
+      effect.element.makeClipping();
+      effect.element.makePositioned();
+    },
+    afterFinishInternal: function(effect) {
+      new Effect.Parallel(
+        [ new Effect.Opacity(effect.element, { sync: true, to: 1.0, from: 0.0, transition: options.opacityTransition }),
+          new Effect.Move(effect.element, { x: moveX, y: moveY, sync: true, transition: options.moveTransition }),
+          new Effect.Scale(effect.element, 100, {
+            scaleMode: { originalHeight: dims.height, originalWidth: dims.width }, 
+            sync: true, scaleFrom: window.opera ? 1 : 0, transition: options.scaleTransition, restoreAfterFinish: true})
+        ], Object.extend({
+             beforeSetup: function(effect) {
+               effect.effects[0].element.setStyle({height: '0px'});
+               effect.effects[0].element.show(); 
+             },
+             afterFinishInternal: function(effect) {
+               effect.effects[0].element.undoClipping();
+               effect.effects[0].element.undoPositioned();
+               effect.effects[0].element.setStyle(oldStyle); 
+             }
+           }, options)
+      )
+    }
+  });
+}
+
+Effect.Shrink = function(element) {
+  element = $(element);
+  var options = Object.extend({
+    direction: 'center',
+    moveTransition: Effect.Transitions.sinoidal,
+    scaleTransition: Effect.Transitions.sinoidal,
+    opacityTransition: Effect.Transitions.none
+  }, arguments[1] || {});
+  var oldStyle = {
+    top: element.style.top,
+    left: element.style.left,
+    height: element.style.height,
+    width: element.style.width,
+    opacity: element.getInlineOpacity() };
+
+  var dims = element.getDimensions();
+  var moveX, moveY;
+  
+  switch (options.direction) {
+    case 'top-left':
+      moveX = moveY = 0;
+      break;
+    case 'top-right':
+      moveX = dims.width;
+      moveY = 0;
+      break;
+    case 'bottom-left':
+      moveX = 0;
+      moveY = dims.height;
+      break;
+    case 'bottom-right':
+      moveX = dims.width;
+      moveY = dims.height;
+      break;
+    case 'center':  
+      moveX = dims.width / 2;
+      moveY = dims.height / 2;
+      break;
+  }
+  
+  return new Effect.Parallel(
+    [ new Effect.Opacity(element, { sync: true, to: 0.0, from: 1.0, transition: options.opacityTransition }),
+      new Effect.Scale(element, window.opera ? 1 : 0, { sync: true, transition: options.scaleTransition, restoreAfterFinish: true}),
+      new Effect.Move(element, { x: moveX, y: moveY, sync: true, transition: options.moveTransition })
+    ], Object.extend({            
+         beforeStartInternal: function(effect) {
+           effect.effects[0].element.makePositioned();
+           effect.effects[0].element.makeClipping(); },
+         afterFinishInternal: function(effect) {
+           effect.effects[0].element.hide();
+           effect.effects[0].element.undoClipping();
+           effect.effects[0].element.undoPositioned();
+           effect.effects[0].element.setStyle(oldStyle); }
+       }, options)
+  );
+}
+
+Effect.Pulsate = function(element) {
+  element = $(element);
+  var options    = arguments[1] || {};
+  var oldOpacity = element.getInlineOpacity();
+  var transition = options.transition || Effect.Transitions.sinoidal;
+  var reverser   = function(pos){ return transition(1-Effect.Transitions.pulse(pos)) };
+  reverser.bind(transition);
+  return new Effect.Opacity(element, 
+    Object.extend(Object.extend({  duration: 3.0, from: 0,
+      afterFinishInternal: function(effect) { effect.element.setStyle({opacity: oldOpacity}); }
+    }, options), {transition: reverser}));
+}
+
+Effect.Fold = function(element) {
+  element = $(element);
+  var oldStyle = {
+    top: element.style.top,
+    left: element.style.left,
+    width: element.style.width,
+    height: element.style.height };
+  Element.makeClipping(element);
+  return new Effect.Scale(element, 5, Object.extend({   
+    scaleContent: false,
+    scaleX: false,
+    afterFinishInternal: function(effect) {
+    new Effect.Scale(element, 1, { 
+      scaleContent: false, 
+      scaleY: false,
+      afterFinishInternal: function(effect) {
+        effect.element.hide();
+        effect.element.undoClipping(); 
+        effect.element.setStyle(oldStyle);
+      } });
+  }}, arguments[1] || {}));
+};
+
+['setOpacity','getOpacity','getInlineOpacity','forceRerendering','setContentZoom',
+ 'collectTextNodes','collectTextNodesIgnoreClass','childrenWithClassName'].each( 
+  function(f) { Element.Methods[f] = Element[f]; }
+);
+
+Element.Methods.visualEffect = function(element, effect, options) {
+  s = effect.gsub(/_/, '-').camelize();
+  effect_class = s.charAt(0).toUpperCase() + s.substring(1);
+  new Effect[effect_class](element, options);
+  return $(element);
+};
+
+Element.addMethods();
\ No newline at end of file
diff --git a/public/javascripts/prototype.js b/public/javascripts/prototype.js
new file mode 100644
index 0000000..0caf9cd
--- /dev/null
+++ b/public/javascripts/prototype.js
@@ -0,0 +1,2006 @@
+/*  Prototype JavaScript framework, version 1.5.0_rc0
+ *  (c) 2005 Sam Stephenson <sam@conio.net>
+ *
+ *  Prototype is freely distributable under the terms of an MIT-style license.
+ *  For details, see the Prototype web site: http://prototype.conio.net/
+ *
+/*--------------------------------------------------------------------------*/
+
+var Prototype = {
+  Version: '1.5.0_rc0',
+  ScriptFragment: '(?:<script.*?>)((\n|\r|.)*?)(?:<\/script>)',
+
+  emptyFunction: function() {},
+  K: function(x) {return x}
+}
+
+var Class = {
+  create: function() {
+    return function() {
+      this.initialize.apply(this, arguments);
+    }
+  }
+}
+
+var Abstract = new Object();
+
+Object.extend = function(destination, source) {
+  for (var property in source) {
+    destination[property] = source[property];
+  }
+  return destination;
+}
+
+Object.inspect = function(object) {
+  try {
+    if (object == undefined) return 'undefined';
+    if (object == null) return 'null';
+    return object.inspect ? object.inspect() : object.toString();
+  } catch (e) {
+    if (e instanceof RangeError) return '...';
+    throw e;
+  }
+}
+
+Function.prototype.bind = function() {
+  var __method = this, args = $A(arguments), object = args.shift();
+  return function() {
+    return __method.apply(object, args.concat($A(arguments)));
+  }
+}
+
+Function.prototype.bindAsEventListener = function(object) {
+  var __method = this;
+  return function(event) {
+    return __method.call(object, event || window.event);
+  }
+}
+
+Object.extend(Number.prototype, {
+  toColorPart: function() {
+    var digits = this.toString(16);
+    if (this < 16) return '0' + digits;
+    return digits;
+  },
+
+  succ: function() {
+    return this + 1;
+  },
+
+  times: function(iterator) {
+    $R(0, this, true).each(iterator);
+    return this;
+  }
+});
+
+var Try = {
+  these: function() {
+    var returnValue;
+
+    for (var i = 0; i < arguments.length; i++) {
+      var lambda = arguments[i];
+      try {
+        returnValue = lambda();
+        break;
+      } catch (e) {}
+    }
+
+    return returnValue;
+  }
+}
+
+/*--------------------------------------------------------------------------*/
+
+var PeriodicalExecuter = Class.create();
+PeriodicalExecuter.prototype = {
+  initialize: function(callback, frequency) {
+    this.callback = callback;
+    this.frequency = frequency;
+    this.currentlyExecuting = false;
+
+    this.registerCallback();
+  },
+
+  registerCallback: function() {
+    setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
+  },
+
+  onTimerEvent: function() {
+    if (!this.currentlyExecuting) {
+      try {
+        this.currentlyExecuting = true;
+        this.callback();
+      } finally {
+        this.currentlyExecuting = false;
+      }
+    }
+  }
+}
+Object.extend(String.prototype, {
+  gsub: function(pattern, replacement) {
+    var result = '', source = this, match;
+    replacement = arguments.callee.prepareReplacement(replacement);
+
+    while (source.length > 0) {
+      if (match = source.match(pattern)) {
+        result += source.slice(0, match.index);
+        result += (replacement(match) || '').toString();
+        source  = source.slice(match.index + match[0].length);
+      } else {
+        result += source, source = '';
+      }
+    }
+    return result;
+  },
+
+  sub: function(pattern, replacement, count) {
+    replacement = this.gsub.prepareReplacement(replacement);
+    count = count === undefined ? 1 : count;
+
+    return this.gsub(pattern, function(match) {
+      if (--count < 0) return match[0];
+      return replacement(match);
+    });
+  },
+
+  scan: function(pattern, iterator) {
+    this.gsub(pattern, iterator);
+    return this;
+  },
+
+  truncate: function(length, truncation) {
+    length = length || 30;
+    truncation = truncation === undefined ? '...' : truncation;
+    return this.length > length ?
+      this.slice(0, length - truncation.length) + truncation : this;
+  },
+
+  strip: function() {
+    return this.replace(/^\s+/, '').replace(/\s+$/, '');
+  },
+
+  stripTags: function() {
+    return this.replace(/<\/?[^>]+>/gi, '');
+  },
+
+  stripScripts: function() {
+    return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
+  },
+
+  extractScripts: function() {
+    var matchAll = new RegExp(Prototype.ScriptFragment, 'img');
+    var matchOne = new RegExp(Prototype.ScriptFragment, 'im');
+    return (this.match(matchAll) || []).map(function(scriptTag) {
+      return (scriptTag.match(matchOne) || ['', ''])[1];
+    });
+  },
+
+  evalScripts: function() {
+    return this.extractScripts().map(function(script) { return eval(script) });
+  },
+
+  escapeHTML: function() {
+    var div = document.createElement('div');
+    var text = document.createTextNode(this);
+    div.appendChild(text);
+    return div.innerHTML;
+  },
+
+  unescapeHTML: function() {
+    var div = document.createElement('div');
+    div.innerHTML = this.stripTags();
+    return div.childNodes[0] ? div.childNodes[0].nodeValue : '';
+  },
+
+  toQueryParams: function() {
+    var pairs = this.match(/^\??(.*)$/)[1].split('&');
+    return pairs.inject({}, function(params, pairString) {
+      var pair = pairString.split('=');
+      params[pair[0]] = pair[1];
+      return params;
+    });
+  },
+
+  toArray: function() {
+    return this.split('');
+  },
+
+  camelize: function() {
+    var oStringList = this.split('-');
+    if (oStringList.length == 1) return oStringList[0];
+
+    var camelizedString = this.indexOf('-') == 0
+      ? oStringList[0].charAt(0).toUpperCase() + oStringList[0].substring(1)
+      : oStringList[0];
+
+    for (var i = 1, len = oStringList.length; i < len; i++) {
+      var s = oStringList[i];
+      camelizedString += s.charAt(0).toUpperCase() + s.substring(1);
+    }
+
+    return camelizedString;
+  },
+
+  inspect: function() {
+    return "'" + this.replace(/\\/g, '\\\\').replace(/'/g, '\\\'') + "'";
+  }
+});
+
+String.prototype.gsub.prepareReplacement = function(replacement) {
+  if (typeof replacement == 'function') return replacement;
+  var template = new Template(replacement);
+  return function(match) { return template.evaluate(match) };
+}
+
+String.prototype.parseQuery = String.prototype.toQueryParams;
+
+var Template = Class.create();
+Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;
+Template.prototype = {
+  initialize: function(template, pattern) {
+    this.template = template.toString();
+    this.pattern  = pattern || Template.Pattern;
+  },
+
+  evaluate: function(object) {
+    return this.template.gsub(this.pattern, function(match) {
+      var before = match[1];
+      if (before == '\\') return match[2];
+      return before + (object[match[3]] || '').toString();
+    });
+  }
+}
+
+var $break    = new Object();
+var $continue = new Object();
+
+var Enumerable = {
+  each: function(iterator) {
+    var index = 0;
+    try {
+      this._each(function(value) {
+        try {
+          iterator(value, index++);
+        } catch (e) {
+          if (e != $continue) throw e;
+        }
+      });
+    } catch (e) {
+      if (e != $break) throw e;
+    }
+  },
+
+  all: function(iterator) {
+    var result = true;
+    this.each(function(value, index) {
+      result = result && !!(iterator || Prototype.K)(value, index);
+      if (!result) throw $break;
+    });
+    return result;
+  },
+
+  any: function(iterator) {
+    var result = true;
+    this.each(function(value, index) {
+      if (result = !!(iterator || Prototype.K)(value, index))
+        throw $break;
+    });
+    return result;
+  },
+
+  collect: function(iterator) {
+    var results = [];
+    this.each(function(value, index) {
+      results.push(iterator(value, index));
+    });
+    return results;
+  },
+
+  detect: function (iterator) {
+    var result;
+    this.each(function(value, index) {
+      if (iterator(value, index)) {
+        result = value;
+        throw $break;
+      }
+    });
+    return result;
+  },
+
+  findAll: function(iterator) {
+    var results = [];
+    this.each(function(value, index) {
+      if (iterator(value, index))
+        results.push(value);
+    });
+    return results;
+  },
+
+  grep: function(pattern, iterator) {
+    var results = [];
+    this.each(function(value, index) {
+      var stringValue = value.toString();
+      if (stringValue.match(pattern))
+        results.push((iterator || Prototype.K)(value, index));
+    })
+    return results;
+  },
+
+  include: function(object) {
+    var found = false;
+    this.each(function(value) {
+      if (value == object) {
+        found = true;
+        throw $break;
+      }
+    });
+    return found;
+  },
+
+  inject: function(memo, iterator) {
+    this.each(function(value, index) {
+      memo = iterator(memo, value, index);
+    });
+    return memo;
+  },
+
+  invoke: function(method) {
+    var args = $A(arguments).slice(1);
+    return this.collect(function(value) {
+      return value[method].apply(value, args);
+    });
+  },
+
+  max: function(iterator) {
+    var result;
+    this.each(function(value, index) {
+      value = (iterator || Prototype.K)(value, index);
+      if (result == undefined || value >= result)
+        result = value;
+    });
+    return result;
+  },
+
+  min: function(iterator) {
+    var result;
+    this.each(function(value, index) {
+      value = (iterator || Prototype.K)(value, index);
+      if (result == undefined || value < result)
+        result = value;
+    });
+    return result;
+  },
+
+  partition: function(iterator) {
+    var trues = [], falses = [];
+    this.each(function(value, index) {
+      ((iterator || Prototype.K)(value, index) ?
+        trues : falses).push(value);
+    });
+    return [trues, falses];
+  },
+
+  pluck: function(property) {
+    var results = [];
+    this.each(function(value, index) {
+      results.push(value[property]);
+    });
+    return results;
+  },
+
+  reject: function(iterator) {
+    var results = [];
+    this.each(function(value, index) {
+      if (!iterator(value, index))
+        results.push(value);
+    });
+    return results;
+  },
+
+  sortBy: function(iterator) {
+    return this.collect(function(value, index) {
+      return {value: value, criteria: iterator(value, index)};
+    }).sort(function(left, right) {
+      var a = left.criteria, b = right.criteria;
+      return a < b ? -1 : a > b ? 1 : 0;
+    }).pluck('value');
+  },
+
+  toArray: function() {
+    return this.collect(Prototype.K);
+  },
+
+  zip: function() {
+    var iterator = Prototype.K, args = $A(arguments);
+    if (typeof args.last() == 'function')
+      iterator = args.pop();
+
+    var collections = [this].concat(args).map($A);
+    return this.map(function(value, index) {
+      return iterator(collections.pluck(index));
+    });
+  },
+
+  inspect: function() {
+    return '#<Enumerable:' + this.toArray().inspect() + '>';
+  }
+}
+
+Object.extend(Enumerable, {
+  map:     Enumerable.collect,
+  find:    Enumerable.detect,
+  select:  Enumerable.findAll,
+  member:  Enumerable.include,
+  entries: Enumerable.toArray
+});
+var $A = Array.from = function(iterable) {
+  if (!iterable) return [];
+  if (iterable.toArray) {
+    return iterable.toArray();
+  } else {
+    var results = [];
+    for (var i = 0; i < iterable.length; i++)
+      results.push(iterable[i]);
+    return results;
+  }
+}
+
+Object.extend(Array.prototype, Enumerable);
+
+if (!Array.prototype._reverse)
+  Array.prototype._reverse = Array.prototype.reverse;
+
+Object.extend(Array.prototype, {
+  _each: function(iterator) {
+    for (var i = 0; i < this.length; i++)
+      iterator(this[i]);
+  },
+
+  clear: function() {
+    this.length = 0;
+    return this;
+  },
+
+  first: function() {
+    return this[0];
+  },
+
+  last: function() {
+    return this[this.length - 1];
+  },
+
+  compact: function() {
+    return this.select(function(value) {
+      return value != undefined || value != null;
+    });
+  },
+
+  flatten: function() {
+    return this.inject([], function(array, value) {
+      return array.concat(value && value.constructor == Array ?
+        value.flatten() : [value]);
+    });
+  },
+
+  without: function() {
+    var values = $A(arguments);
+    return this.select(function(value) {
+      return !values.include(value);
+    });
+  },
+
+  indexOf: function(object) {
+    for (var i = 0; i < this.length; i++)
+      if (this[i] == object) return i;
+    return -1;
+  },
+
+  reverse: function(inline) {
+    return (inline !== false ? this : this.toArray())._reverse();
+  },
+
+  inspect: function() {
+    return '[' + this.map(Object.inspect).join(', ') + ']';
+  }
+});
+var Hash = {
+  _each: function(iterator) {
+    for (var key in this) {
+      var value = this[key];
+      if (typeof value == 'function') continue;
+
+      var pair = [key, value];
+      pair.key = key;
+      pair.value = value;
+      iterator(pair);
+    }
+  },
+
+  keys: function() {
+    return this.pluck('key');
+  },
+
+  values: function() {
+    return this.pluck('value');
+  },
+
+  merge: function(hash) {
+    return $H(hash).inject($H(this), function(mergedHash, pair) {
+      mergedHash[pair.key] = pair.value;
+      return mergedHash;
+    });
+  },
+
+  toQueryString: function() {
+    return this.map(function(pair) {
+      return pair.map(encodeURIComponent).join('=');
+    }).join('&');
+  },
+
+  inspect: function() {
+    return '#<Hash:{' + this.map(function(pair) {
+      return pair.map(Object.inspect).join(': ');
+    }).join(', ') + '}>';
+  }
+}
+
+function $H(object) {
+  var hash = Object.extend({}, object || {});
+  Object.extend(hash, Enumerable);
+  Object.extend(hash, Hash);
+  return hash;
+}
+ObjectRange = Class.create();
+Object.extend(ObjectRange.prototype, Enumerable);
+Object.extend(ObjectRange.prototype, {
+  initialize: function(start, end, exclusive) {
+    this.start = start;
+    this.end = end;
+    this.exclusive = exclusive;
+  },
+
+  _each: function(iterator) {
+    var value = this.start;
+    do {
+      iterator(value);
+      value = value.succ();
+    } while (this.include(value));
+  },
+
+  include: function(value) {
+    if (value < this.start)
+      return false;
+    if (this.exclusive)
+      return value < this.end;
+    return value <= this.end;
+  }
+});
+
+var $R = function(start, end, exclusive) {
+  return new ObjectRange(start, end, exclusive);
+}
+
+var Ajax = {
+  getTransport: function() {
+    return Try.these(
+      function() {return new XMLHttpRequest()},
+      function() {return new ActiveXObject('Msxml2.XMLHTTP')},
+      function() {return new ActiveXObject('Microsoft.XMLHTTP')}
+    ) || false;
+  },
+
+  activeRequestCount: 0
+}
+
+Ajax.Responders = {
+  responders: [],
+
+  _each: function(iterator) {
+    this.responders._each(iterator);
+  },
+
+  register: function(responderToAdd) {
+    if (!this.include(responderToAdd))
+      this.responders.push(responderToAdd);
+  },
+
+  unregister: function(responderToRemove) {
+    this.responders = this.responders.without(responderToRemove);
+  },
+
+  dispatch: function(callback, request, transport, json) {
+    this.each(function(responder) {
+      if (responder[callback] && typeof responder[callback] == 'function') {
+        try {
+          responder[callback].apply(responder, [request, transport, json]);
+        } catch (e) {}
+      }
+    });
+  }
+};
+
+Object.extend(Ajax.Responders, Enumerable);
+
+Ajax.Responders.register({
+  onCreate: function() {
+    Ajax.activeRequestCount++;
+  },
+
+  onComplete: function() {
+    Ajax.activeRequestCount--;
+  }
+});
+
+Ajax.Base = function() {};
+Ajax.Base.prototype = {
+  setOptions: function(options) {
+    this.options = {
+      method:       'post',
+      asynchronous: true,
+      contentType:  'application/x-www-form-urlencoded',
+      parameters:   ''
+    }
+    Object.extend(this.options, options || {});
+  },
+
+  responseIsSuccess: function() {
+    return this.transport.status == undefined
+        || this.transport.status == 0
+        || (this.transport.status >= 200 && this.transport.status < 300);
+  },
+
+  responseIsFailure: function() {
+    return !this.responseIsSuccess();
+  }
+}
+
+Ajax.Request = Class.create();
+Ajax.Request.Events =
+  ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];
+
+Ajax.Request.prototype = Object.extend(new Ajax.Base(), {
+  initialize: function(url, options) {
+    this.transport = Ajax.getTransport();
+    this.setOptions(options);
+    this.request(url);
+  },
+
+  request: function(url) {
+    var parameters = this.options.parameters || '';
+    if (parameters.length > 0) parameters += '&_=';
+
+    try {
+      this.url = url;
+      if (this.options.method == 'get' && parameters.length > 0)
+        this.url += (this.url.match(/\?/) ? '&' : '?') + parameters;
+
+      Ajax.Responders.dispatch('onCreate', this, this.transport);
+
+      this.transport.open(this.options.method, this.url,
+        this.options.asynchronous);
+
+      if (this.options.asynchronous) {
+        this.transport.onreadystatechange = this.onStateChange.bind(this);
+        setTimeout((function() {this.respondToReadyState(1)}).bind(this), 10);
+      }
+
+      this.setRequestHeaders();
+
+      var body = this.options.postBody ? this.options.postBody : parameters;
+      this.transport.send(this.options.method == 'post' ? body : null);
+
+    } catch (e) {
+      this.dispatchException(e);
+    }
+  },
+
+  setRequestHeaders: function() {
+    var requestHeaders =
+      ['X-Requested-With', 'XMLHttpRequest',
+       'X-Prototype-Version', Prototype.Version,
+       'Accept', 'text/javascript, text/html, application/xml, text/xml, */*'];
+
+    if (this.options.method == 'post') {
+      requestHeaders.push('Content-type', this.options.contentType);
+
+      /* Force "Connection: close" for Mozilla browsers to work around
+       * a bug where XMLHttpReqeuest sends an incorrect Content-length
+       * header. See Mozilla Bugzilla #246651.
+       */
+      if (this.transport.overrideMimeType)
+        requestHeaders.push('Connection', 'close');
+    }
+
+    if (this.options.requestHeaders)
+      requestHeaders.push.apply(requestHeaders, this.options.requestHeaders);
+
+    for (var i = 0; i < requestHeaders.length; i += 2)
+      this.transport.setRequestHeader(requestHeaders[i], requestHeaders[i+1]);
+  },
+
+  onStateChange: function() {
+    var readyState = this.transport.readyState;
+    if (readyState != 1)
+      this.respondToReadyState(this.transport.readyState);
+  },
+
+  header: function(name) {
+    try {
+      return this.transport.getResponseHeader(name);
+    } catch (e) {}
+  },
+
+  evalJSON: function() {
+    try {
+      return eval('(' + this.header('X-JSON') + ')');
+    } catch (e) {}
+  },
+
+  evalResponse: function() {
+    try {
+      return eval(this.transport.responseText);
+    } catch (e) {
+      this.dispatchException(e);
+    }
+  },
+
+  respondToReadyState: function(readyState) {
+    var event = Ajax.Request.Events[readyState];
+    var transport = this.transport, json = this.evalJSON();
+
+    if (event == 'Complete') {
+      try {
+        (this.options['on' + this.transport.status]
+         || this.options['on' + (this.responseIsSuccess() ? 'Success' : 'Failure')]
+         || Prototype.emptyFunction)(transport, json);
+      } catch (e) {
+        this.dispatchException(e);
+      }
+
+      if ((this.header('Content-type') || '').match(/^text\/javascript/i))
+        this.evalResponse();
+    }
+
+    try {
+      (this.options['on' + event] || Prototype.emptyFunction)(transport, json);
+      Ajax.Responders.dispatch('on' + event, this, transport, json);
+    } catch (e) {
+      this.dispatchException(e);
+    }
+
+    /* Avoid memory leak in MSIE: clean up the oncomplete event handler */
+    if (event == 'Complete')
+      this.transport.onreadystatechange = Prototype.emptyFunction;
+  },
+
+  dispatchException: function(exception) {
+    (this.options.onException || Prototype.emptyFunction)(this, exception);
+    Ajax.Responders.dispatch('onException', this, exception);
+  }
+});
+
+Ajax.Updater = Class.create();
+
+Object.extend(Object.extend(Ajax.Updater.prototype, Ajax.Request.prototype), {
+  initialize: function(container, url, options) {
+    this.containers = {
+      success: container.success ? $(container.success) : $(container),
+      failure: container.failure ? $(container.failure) :
+        (container.success ? null : $(container))
+    }
+
+    this.transport = Ajax.getTransport();
+    this.setOptions(options);
+
+    var onComplete = this.options.onComplete || Prototype.emptyFunction;
+    this.options.onComplete = (function(transport, object) {
+      this.updateContent();
+      onComplete(transport, object);
+    }).bind(this);
+
+    this.request(url);
+  },
+
+  updateContent: function() {
+    var receiver = this.responseIsSuccess() ?
+      this.containers.success : this.containers.failure;
+    var response = this.transport.responseText;
+
+    if (!this.options.evalScripts)
+      response = response.stripScripts();
+
+    if (receiver) {
+      if (this.options.insertion) {
+        new this.options.insertion(receiver, response);
+      } else {
+        Element.update(receiver, response);
+      }
+    }
+
+    if (this.responseIsSuccess()) {
+      if (this.onComplete)
+        setTimeout(this.onComplete.bind(this), 10);
+    }
+  }
+});
+
+Ajax.PeriodicalUpdater = Class.create();
+Ajax.PeriodicalUpdater.prototype = Object.extend(new Ajax.Base(), {
+  initialize: function(container, url, options) {
+    this.setOptions(options);
+    this.onComplete = this.options.onComplete;
+
+    this.frequency = (this.options.frequency || 2);
+    this.decay = (this.options.decay || 1);
+
+    this.updater = {};
+    this.container = container;
+    this.url = url;
+
+    this.start();
+  },
+
+  start: function() {
+    this.options.onComplete = this.updateComplete.bind(this);
+    this.onTimerEvent();
+  },
+
+  stop: function() {
+    this.updater.onComplete = undefined;
+    clearTimeout(this.timer);
+    (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
+  },
+
+  updateComplete: function(request) {
+    if (this.options.decay) {
+      this.decay = (request.responseText == this.lastText ?
+        this.decay * this.options.decay : 1);
+
+      this.lastText = request.responseText;
+    }
+    this.timer = setTimeout(this.onTimerEvent.bind(this),
+      this.decay * this.frequency * 1000);
+  },
+
+  onTimerEvent: function() {
+    this.updater = new Ajax.Updater(this.container, this.url, this.options);
+  }
+});
+function $() {
+  var results = [], element;
+  for (var i = 0; i < arguments.length; i++) {
+    element = arguments[i];
+    if (typeof element == 'string')
+      element = document.getElementById(element);
+    results.push(Element.extend(element));
+  }
+  return results.length < 2 ? results[0] : results;
+}
+
+document.getElementsByClassName = function(className, parentElement) {
+  var children = ($(parentElement) || document.body).getElementsByTagName('*');
+  return $A(children).inject([], function(elements, child) {
+    if (child.className.match(new RegExp("(^|\\s)" + className + "(\\s|$)")))
+      elements.push(Element.extend(child));
+    return elements;
+  });
+}
+
+/*--------------------------------------------------------------------------*/
+
+if (!window.Element)
+  var Element = new Object();
+
+Element.extend = function(element) {
+  if (!element) return;
+  if (_nativeExtensions) return element;
+
+  if (!element._extended && element.tagName && element != window) {
+    var methods = Element.Methods, cache = Element.extend.cache;
+    for (property in methods) {
+      var value = methods[property];
+      if (typeof value == 'function')
+        element[property] = cache.findOrStore(value);
+    }
+  }
+
+  element._extended = true;
+  return element;
+}
+
+Element.extend.cache = {
+  findOrStore: function(value) {
+    return this[value] = this[value] || function() {
+      return value.apply(null, [this].concat($A(arguments)));
+    }
+  }
+}
+
+Element.Methods = {
+  visible: function(element) {
+    return $(element).style.display != 'none';
+  },
+
+  toggle: function() {
+    for (var i = 0; i < arguments.length; i++) {
+      var element = $(arguments[i]);
+      Element[Element.visible(element) ? 'hide' : 'show'](element);
+    }
+  },
+
+  hide: function() {
+    for (var i = 0; i < arguments.length; i++) {
+      var element = $(arguments[i]);
+      element.style.display = 'none';
+    }
+  },
+
+  show: function() {
+    for (var i = 0; i < arguments.length; i++) {
+      var element = $(arguments[i]);
+      element.style.display = '';
+    }
+  },
+
+  remove: function(element) {
+    element = $(element);
+    element.parentNode.removeChild(element);
+  },
+
+  update: function(element, html) {
+    $(element).innerHTML = html.stripScripts();
+    setTimeout(function() {html.evalScripts()}, 10);
+  },
+
+  replace: function(element, html) {
+    element = $(element);
+    if (element.outerHTML) {
+      element.outerHTML = html.stripScripts();
+    } else {
+      var range = element.ownerDocument.createRange();
+      range.selectNodeContents(element);
+      element.parentNode.replaceChild(
+        range.createContextualFragment(html.stripScripts()), element);
+    }
+    setTimeout(function() {html.evalScripts()}, 10);
+  },
+
+  getHeight: function(element) {
+    element = $(element);
+    return element.offsetHeight;
+  },
+
+  classNames: function(element) {
+    return new Element.ClassNames(element);
+  },
+
+  hasClassName: function(element, className) {
+    if (!(element = $(element))) return;
+    return Element.classNames(element).include(className);
+  },
+
+  addClassName: function(element, className) {
+    if (!(element = $(element))) return;
+    return Element.classNames(element).add(className);
+  },
+
+  removeClassName: function(element, className) {
+    if (!(element = $(element))) return;
+    return Element.classNames(element).remove(className);
+  },
+
+  // removes whitespace-only text node children
+  cleanWhitespace: function(element) {
+    element = $(element);
+    for (var i = 0; i < element.childNodes.length; i++) {
+      var node = element.childNodes[i];
+      if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
+        Element.remove(node);
+    }
+  },
+
+  empty: function(element) {
+    return $(element).innerHTML.match(/^\s*$/);
+  },
+
+  childOf: function(element, ancestor) {
+    element = $(element), ancestor = $(ancestor);
+    while (element = element.parentNode)
+      if (element == ancestor) return true;
+    return false;
+  },
+
+  scrollTo: function(element) {
+    element = $(element);
+    var x = element.x ? element.x : element.offsetLeft,
+        y = element.y ? element.y : element.offsetTop;
+    window.scrollTo(x, y);
+  },
+
+  getStyle: function(element, style) {
+    element = $(element);
+    var value = element.style[style.camelize()];
+    if (!value) {
+      if (document.defaultView && document.defaultView.getComputedStyle) {
+        var css = document.defaultView.getComputedStyle(element, null);
+        value = css ? css.getPropertyValue(style) : null;
+      } else if (element.currentStyle) {
+        value = element.currentStyle[style.camelize()];
+      }
+    }
+
+    if (window.opera && ['left', 'top', 'right', 'bottom'].include(style))
+      if (Element.getStyle(element, 'position') == 'static') value = 'auto';
+
+    return value == 'auto' ? null : value;
+  },
+
+  setStyle: function(element, style) {
+    element = $(element);
+    for (var name in style)
+      element.style[name.camelize()] = style[name];
+  },
+
+  getDimensions: function(element) {
+    element = $(element);
+    if (Element.getStyle(element, 'display') != 'none')
+      return {width: element.offsetWidth, height: element.offsetHeight};
+
+    // All *Width and *Height properties give 0 on elements with display none,
+    // so enable the element temporarily
+    var els = element.style;
+    var originalVisibility = els.visibility;
+    var originalPosition = els.position;
+    els.visibility = 'hidden';
+    els.position = 'absolute';
+    els.display = '';
+    var originalWidth = element.clientWidth;
+    var originalHeight = element.clientHeight;
+    els.display = 'none';
+    els.position = originalPosition;
+    els.visibility = originalVisibility;
+    return {width: originalWidth, height: originalHeight};
+  },
+
+  makePositioned: function(element) {
+    element = $(element);
+    var pos = Element.getStyle(element, 'position');
+    if (pos == 'static' || !pos) {
+      element._madePositioned = true;
+      element.style.position = 'relative';
+      // Opera returns the offset relative to the positioning context, when an
+      // element is position relative but top and left have not been defined
+      if (window.opera) {
+        element.style.top = 0;
+        element.style.left = 0;
+      }
+    }
+  },
+
+  undoPositioned: function(element) {
+    element = $(element);
+    if (element._madePositioned) {
+      element._madePositioned = undefined;
+      element.style.position =
+        element.style.top =
+        element.style.left =
+        element.style.bottom =
+        element.style.right = '';
+    }
+  },
+
+  makeClipping: function(element) {
+    element = $(element);
+    if (element._overflow) return;
+    element._overflow = element.style.overflow;
+    if ((Element.getStyle(element, 'overflow') || 'visible') != 'hidden')
+      element.style.overflow = 'hidden';
+  },
+
+  undoClipping: function(element) {
+    element = $(element);
+    if (element._overflow) return;
+    element.style.overflow = element._overflow;
+    element._overflow = undefined;
+  }
+}
+
+Object.extend(Element, Element.Methods);
+
+var _nativeExtensions = false;
+
+if(!HTMLElement && /Konqueror|Safari|KHTML/.test(navigator.userAgent)) {
+  var HTMLElement = {}
+  HTMLElement.prototype = document.createElement('div').__proto__;
+}
+
+Element.addMethods = function(methods) {
+  Object.extend(Element.Methods, methods || {});
+
+  if(typeof HTMLElement != 'undefined') {
+    var methods = Element.Methods, cache = Element.extend.cache;
+    for (property in methods) {
+      var value = methods[property];
+      if (typeof value == 'function')
+        HTMLElement.prototype[property] = cache.findOrStore(value);
+    }
+    _nativeExtensions = true;
+  }
+}
+
+Element.addMethods();
+
+var Toggle = new Object();
+Toggle.display = Element.toggle;
+
+/*--------------------------------------------------------------------------*/
+
+Abstract.Insertion = function(adjacency) {
+  this.adjacency = adjacency;
+}
+
+Abstract.Insertion.prototype = {
+  initialize: function(element, content) {
+    this.element = $(element);
+    this.content = content.stripScripts();
+
+    if (this.adjacency && this.element.insertAdjacentHTML) {
+      try {
+        this.element.insertAdjacentHTML(this.adjacency, this.content);
+      } catch (e) {
+        var tagName = this.element.tagName.toLowerCase();
+        if (tagName == 'tbody' || tagName == 'tr') {
+          this.insertContent(this.contentFromAnonymousTable());
+        } else {
+          throw e;
+        }
+      }
+    } else {
+      this.range = this.element.ownerDocument.createRange();
+      if (this.initializeRange) this.initializeRange();
+      this.insertContent([this.range.createContextualFragment(this.content)]);
+    }
+
+    setTimeout(function() {content.evalScripts()}, 10);
+  },
+
+  contentFromAnonymousTable: function() {
+    var div = document.createElement('div');
+    div.innerHTML = '<table><tbody>' + this.content + '</tbody></table>';
+    return $A(div.childNodes[0].childNodes[0].childNodes);
+  }
+}
+
+var Insertion = new Object();
+
+Insertion.Before = Class.create();
+Insertion.Before.prototype = Object.extend(new Abstract.Insertion('beforeBegin'), {
+  initializeRange: function() {
+    this.range.setStartBefore(this.element);
+  },
+
+  insertContent: function(fragments) {
+    fragments.each((function(fragment) {
+      this.element.parentNode.insertBefore(fragment, this.element);
+    }).bind(this));
+  }
+});
+
+Insertion.Top = Class.create();
+Insertion.Top.prototype = Object.extend(new Abstract.Insertion('afterBegin'), {
+  initializeRange: function() {
+    this.range.selectNodeContents(this.element);
+    this.range.collapse(true);
+  },
+
+  insertContent: function(fragments) {
+    fragments.reverse(false).each((function(fragment) {
+      this.element.insertBefore(fragment, this.element.firstChild);
+    }).bind(this));
+  }
+});
+
+Insertion.Bottom = Class.create();
+Insertion.Bottom.prototype = Object.extend(new Abstract.Insertion('beforeEnd'), {
+  initializeRange: function() {
+    this.range.selectNodeContents(this.element);
+    this.range.collapse(this.element);
+  },
+
+  insertContent: function(fragments) {
+    fragments.each((function(fragment) {
+      this.element.appendChild(fragment);
+    }).bind(this));
+  }
+});
+
+Insertion.After = Class.create();
+Insertion.After.prototype = Object.extend(new Abstract.Insertion('afterEnd'), {
+  initializeRange: function() {
+    this.range.setStartAfter(this.element);
+  },
+
+  insertContent: function(fragments) {
+    fragments.each((function(fragment) {
+      this.element.parentNode.insertBefore(fragment,
+        this.element.nextSibling);
+    }).bind(this));
+  }
+});
+
+/*--------------------------------------------------------------------------*/
+
+Element.ClassNames = Class.create();
+Element.ClassNames.prototype = {
+  initialize: function(element) {
+    this.element = $(element);
+  },
+
+  _each: function(iterator) {
+    this.element.className.split(/\s+/).select(function(name) {
+      return name.length > 0;
+    })._each(iterator);
+  },
+
+  set: function(className) {
+    this.element.className = className;
+  },
+
+  add: function(classNameToAdd) {
+    if (this.include(classNameToAdd)) return;
+    this.set(this.toArray().concat(classNameToAdd).join(' '));
+  },
+
+  remove: function(classNameToRemove) {
+    if (!this.include(classNameToRemove)) return;
+    this.set(this.select(function(className) {
+      return className != classNameToRemove;
+    }).join(' '));
+  },
+
+  toString: function() {
+    return this.toArray().join(' ');
+  }
+}
+
+Object.extend(Element.ClassNames.prototype, Enumerable);
+var Selector = Class.create();
+Selector.prototype = {
+  initialize: function(expression) {
+    this.params = {classNames: []};
+    this.expression = expression.toString().strip();
+    this.parseExpression();
+    this.compileMatcher();
+  },
+
+  parseExpression: function() {
+    function abort(message) { throw 'Parse error in selector: ' + message; }
+
+    if (this.expression == '')  abort('empty expression');
+
+    var params = this.params, expr = this.expression, match, modifier, clause, rest;
+    while (match = expr.match(/^(.*)\[([a-z0-9_:-]+?)(?:([~\|!]?=)(?:"([^"]*)"|([^\]\s]*)))?\]$/i)) {
+      params.attributes = params.attributes || [];
+      params.attributes.push({name: match[2], operator: match[3], value: match[4] || match[5] || ''});
+      expr = match[1];
+    }
+
+    if (expr == '*') return this.params.wildcard = true;
+
+    while (match = expr.match(/^([^a-z0-9_-])?([a-z0-9_-]+)(.*)/i)) {
+      modifier = match[1], clause = match[2], rest = match[3];
+      switch (modifier) {
+        case '#':       params.id = clause; break;
+        case '.':       params.classNames.push(clause); break;
+        case '':
+        case undefined: params.tagName = clause.toUpperCase(); break;
+        default:        abort(expr.inspect());
+      }
+      expr = rest;
+    }
+
+    if (expr.length > 0) abort(expr.inspect());
+  },
+
+  buildMatchExpression: function() {
+    var params = this.params, conditions = [], clause;
+
+    if (params.wildcard)
+      conditions.push('true');
+    if (clause = params.id)
+      conditions.push('element.id == ' + clause.inspect());
+    if (clause = params.tagName)
+      conditions.push('element.tagName.toUpperCase() == ' + clause.inspect());
+    if ((clause = params.classNames).length > 0)
+      for (var i = 0; i < clause.length; i++)
+        conditions.push('Element.hasClassName(element, ' + clause[i].inspect() + ')');
+    if (clause = params.attributes) {
+      clause.each(function(attribute) {
+        var value = 'element.getAttribute(' + attribute.name.inspect() + ')';
+        var splitValueBy = function(delimiter) {
+          return value + ' && ' + value + '.split(' + delimiter.inspect() + ')';
+        }
+
+        switch (attribute.operator) {
+          case '=':       conditions.push(value + ' == ' + attribute.value.inspect()); break;
+          case '~=':      conditions.push(splitValueBy(' ') + '.include(' + attribute.value.inspect() + ')'); break;
+          case '|=':      conditions.push(
+                            splitValueBy('-') + '.first().toUpperCase() == ' + attribute.value.toUpperCase().inspect()
+                          ); break;
+          case '!=':      conditions.push(value + ' != ' + attribute.value.inspect()); break;
+          case '':
+          case undefined: conditions.push(value + ' != null'); break;
+          default:        throw 'Unknown operator ' + attribute.operator + ' in selector';
+        }
+      });
+    }
+
+    return conditions.join(' && ');
+  },
+
+  compileMatcher: function() {
+    this.match = new Function('element', 'if (!element.tagName) return false; \
+      return ' + this.buildMatchExpression());
+  },
+
+  findElements: function(scope) {
+    var element;
+
+    if (element = $(this.params.id))
+      if (this.match(element))
+        if (!scope || Element.childOf(element, scope))
+          return [element];
+
+    scope = (scope || document).getElementsByTagName(this.params.tagName || '*');
+
+    var results = [];
+    for (var i = 0; i < scope.length; i++)
+      if (this.match(element = scope[i]))
+        results.push(Element.extend(element));
+
+    return results;
+  },
+
+  toString: function() {
+    return this.expression;
+  }
+}
+
+function $$() {
+  return $A(arguments).map(function(expression) {
+    return expression.strip().split(/\s+/).inject([null], function(results, expr) {
+      var selector = new Selector(expr);
+      return results.map(selector.findElements.bind(selector)).flatten();
+    });
+  }).flatten();
+}
+var Field = {
+  clear: function() {
+    for (var i = 0; i < arguments.length; i++)
+      $(arguments[i]).value = '';
+  },
+
+  focus: function(element) {
+    $(element).focus();
+  },
+
+  present: function() {
+    for (var i = 0; i < arguments.length; i++)
+      if ($(arguments[i]).value == '') return false;
+    return true;
+  },
+
+  select: function(element) {
+    $(element).select();
+  },
+
+  activate: function(element) {
+    element = $(element);
+    element.focus();
+    if (element.select)
+      element.select();
+  }
+}
+
+/*--------------------------------------------------------------------------*/
+
+var Form = {
+  serialize: function(form) {
+    var elements = Form.getElements($(form));
+    var queryComponents = new Array();
+
+    for (var i = 0; i < elements.length; i++) {
+      var queryComponent = Form.Element.serialize(elements[i]);
+      if (queryComponent)
+        queryComponents.push(queryComponent);
+    }
+
+    return queryComponents.join('&');
+  },
+
+  getElements: function(form) {
+    form = $(form);
+    var elements = new Array();
+
+    for (var tagName in Form.Element.Serializers) {
+      var tagElements = form.getElementsByTagName(tagName);
+      for (var j = 0; j < tagElements.length; j++)
+        elements.push(tagElements[j]);
+    }
+    return elements;
+  },
+
+  getInputs: function(form, typeName, name) {
+    form = $(form);
+    var inputs = form.getElementsByTagName('input');
+
+    if (!typeName && !name)
+      return inputs;
+
+    var matchingInputs = new Array();
+    for (var i = 0; i < inputs.length; i++) {
+      var input = inputs[i];
+      if ((typeName && input.type != typeName) ||
+          (name && input.name != name))
+        continue;
+      matchingInputs.push(input);
+    }
+
+    return matchingInputs;
+  },
+
+  disable: function(form) {
+    var elements = Form.getElements(form);
+    for (var i = 0; i < elements.length; i++) {
+      var element = elements[i];
+      element.blur();
+      element.disabled = 'true';
+    }
+  },
+
+  enable: function(form) {
+    var elements = Form.getElements(form);
+    for (var i = 0; i < elements.length; i++) {
+      var element = elements[i];
+      element.disabled = '';
+    }
+  },
+
+  findFirstElement: function(form) {
+    return Form.getElements(form).find(function(element) {
+      return element.type != 'hidden' && !element.disabled &&
+        ['input', 'select', 'textarea'].include(element.tagName.toLowerCase());
+    });
+  },
+
+  focusFirstElement: function(form) {
+    Field.activate(Form.findFirstElement(form));
+  },
+
+  reset: function(form) {
+    $(form).reset();
+  }
+}
+
+Form.Element = {
+  serialize: function(element) {
+    element = $(element);
+    var method = element.tagName.toLowerCase();
+    var parameter = Form.Element.Serializers[method](element);
+
+    if (parameter) {
+      var key = encodeURIComponent(parameter[0]);
+      if (key.length == 0) return;
+
+      if (parameter[1].constructor != Array)
+        parameter[1] = [parameter[1]];
+
+      return parameter[1].map(function(value) {
+        return key + '=' + encodeURIComponent(value);
+      }).join('&');
+    }
+  },
+
+  getValue: function(element) {
+    element = $(element);
+    var method = element.tagName.toLowerCase();
+    var parameter = Form.Element.Serializers[method](element);
+
+    if (parameter)
+      return parameter[1];
+  }
+}
+
+Form.Element.Serializers = {
+  input: function(element) {
+    switch (element.type.toLowerCase()) {
+      case 'submit':
+      case 'hidden':
+      case 'password':
+      case 'text':
+        return Form.Element.Serializers.textarea(element);
+      case 'checkbox':
+      case 'radio':
+        return Form.Element.Serializers.inputSelector(element);
+    }
+    return false;
+  },
+
+  inputSelector: function(element) {
+    if (element.checked)
+      return [element.name, element.value];
+  },
+
+  textarea: function(element) {
+    return [element.name, element.value];
+  },
+
+  select: function(element) {
+    return Form.Element.Serializers[element.type == 'select-one' ?
+      'selectOne' : 'selectMany'](element);
+  },
+
+  selectOne: function(element) {
+    var value = '', opt, index = element.selectedIndex;
+    if (index >= 0) {
+      opt = element.options[index];
+      value = opt.value || opt.text;
+    }
+    return [element.name, value];
+  },
+
+  selectMany: function(element) {
+    var value = [];
+    for (var i = 0; i < element.length; i++) {
+      var opt = element.options[i];
+      if (opt.selected)
+        value.push(opt.value || opt.text);
+    }
+    return [element.name, value];
+  }
+}
+
+/*--------------------------------------------------------------------------*/
+
+var $F = Form.Element.getValue;
+
+/*--------------------------------------------------------------------------*/
+
+Abstract.TimedObserver = function() {}
+Abstract.TimedObserver.prototype = {
+  initialize: function(element, frequency, callback) {
+    this.frequency = frequency;
+    this.element   = $(element);
+    this.callback  = callback;
+
+    this.lastValue = this.getValue();
+    this.registerCallback();
+  },
+
+  registerCallback: function() {
+    setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
+  },
+
+  onTimerEvent: function() {
+    var value = this.getValue();
+    if (this.lastValue != value) {
+      this.callback(this.element, value);
+      this.lastValue = value;
+    }
+  }
+}
+
+Form.Element.Observer = Class.create();
+Form.Element.Observer.prototype = Object.extend(new Abstract.TimedObserver(), {
+  getValue: function() {
+    return Form.Element.getValue(this.element);
+  }
+});
+
+Form.Observer = Class.create();
+Form.Observer.prototype = Object.extend(new Abstract.TimedObserver(), {
+  getValue: function() {
+    return Form.serialize(this.element);
+  }
+});
+
+/*--------------------------------------------------------------------------*/
+
+Abstract.EventObserver = function() {}
+Abstract.EventObserver.prototype = {
+  initialize: function(element, callback) {
+    this.element  = $(element);
+    this.callback = callback;
+
+    this.lastValue = this.getValue();
+    if (this.element.tagName.toLowerCase() == 'form')
+      this.registerFormCallbacks();
+    else
+      this.registerCallback(this.element);
+  },
+
+  onElementEvent: function() {
+    var value = this.getValue();
+    if (this.lastValue != value) {
+      this.callback(this.element, value);
+      this.lastValue = value;
+    }
+  },
+
+  registerFormCallbacks: function() {
+    var elements = Form.getElements(this.element);
+    for (var i = 0; i < elements.length; i++)
+      this.registerCallback(elements[i]);
+  },
+
+  registerCallback: function(element) {
+    if (element.type) {
+      switch (element.type.toLowerCase()) {
+        case 'checkbox':
+        case 'radio':
+          Event.observe(element, 'click', this.onElementEvent.bind(this));
+          break;
+        case 'password':
+        case 'text':
+        case 'textarea':
+        case 'select-one':
+        case 'select-multiple':
+          Event.observe(element, 'change', this.onElementEvent.bind(this));
+          break;
+      }
+    }
+  }
+}
+
+Form.Element.EventObserver = Class.create();
+Form.Element.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), {
+  getValue: function() {
+    return Form.Element.getValue(this.element);
+  }
+});
+
+Form.EventObserver = Class.create();
+Form.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), {
+  getValue: function() {
+    return Form.serialize(this.element);
+  }
+});
+if (!window.Event) {
+  var Event = new Object();
+}
+
+Object.extend(Event, {
+  KEY_BACKSPACE: 8,
+  KEY_TAB:       9,
+  KEY_RETURN:   13,
+  KEY_ESC:      27,
+  KEY_LEFT:     37,
+  KEY_UP:       38,
+  KEY_RIGHT:    39,
+  KEY_DOWN:     40,
+  KEY_DELETE:   46,
+
+  element: function(event) {
+    return event.target || event.srcElement;
+  },
+
+  isLeftClick: function(event) {
+    return (((event.which) && (event.which == 1)) ||
+            ((event.button) && (event.button == 1)));
+  },
+
+  pointerX: function(event) {
+    return event.pageX || (event.clientX +
+      (document.documentElement.scrollLeft || document.body.scrollLeft));
+  },
+
+  pointerY: function(event) {
+    return event.pageY || (event.clientY +
+      (document.documentElement.scrollTop || document.body.scrollTop));
+  },
+
+  stop: function(event) {
+    if (event.preventDefault) {
+      event.preventDefault();
+      event.stopPropagation();
+    } else {
+      event.returnValue = false;
+      event.cancelBubble = true;
+    }
+  },
+
+  // find the first node with the given tagName, starting from the
+  // node the event was triggered on; traverses the DOM upwards
+  findElement: function(event, tagName) {
+    var element = Event.element(event);
+    while (element.parentNode && (!element.tagName ||
+        (element.tagName.toUpperCase() != tagName.toUpperCase())))
+      element = element.parentNode;
+    return element;
+  },
+
+  observers: false,
+
+  _observeAndCache: function(element, name, observer, useCapture) {
+    if (!this.observers) this.observers = [];
+    if (element.addEventListener) {
+      this.observers.push([element, name, observer, useCapture]);
+      element.addEventListener(name, observer, useCapture);
+    } else if (element.attachEvent) {
+      this.observers.push([element, name, observer, useCapture]);
+      element.attachEvent('on' + name, observer);
+    }
+  },
+
+  unloadCache: function() {
+    if (!Event.observers) return;
+    for (var i = 0; i < Event.observers.length; i++) {
+      Event.stopObserving.apply(this, Event.observers[i]);
+      Event.observers[i][0] = null;
+    }
+    Event.observers = false;
+  },
+
+  observe: function(element, name, observer, useCapture) {
+    var element = $(element);
+    useCapture = useCapture || false;
+
+    if (name == 'keypress' &&
+        (navigator.appVersion.match(/Konqueror|Safari|KHTML/)
+        || element.attachEvent))
+      name = 'keydown';
+
+    this._observeAndCache(element, name, observer, useCapture);
+  },
+
+  stopObserving: function(element, name, observer, useCapture) {
+    var element = $(element);
+    useCapture = useCapture || false;
+
+    if (name == 'keypress' &&
+        (navigator.appVersion.match(/Konqueror|Safari|KHTML/)
+        || element.detachEvent))
+      name = 'keydown';
+
+    if (element.removeEventListener) {
+      element.removeEventListener(name, observer, useCapture);
+    } else if (element.detachEvent) {
+      element.detachEvent('on' + name, observer);
+    }
+  }
+});
+
+/* prevent memory leaks in IE */
+if (navigator.appVersion.match(/\bMSIE\b/))
+  Event.observe(window, 'unload', Event.unloadCache, false);
+var Position = {
+  // set to true if needed, warning: firefox performance problems
+  // NOT neeeded for page scrolling, only if draggable contained in
+  // scrollable elements
+  includeScrollOffsets: false,
+
+  // must be called before calling withinIncludingScrolloffset, every time the
+  // page is scrolled
+  prepare: function() {
+    this.deltaX =  window.pageXOffset
+                || document.documentElement.scrollLeft
+                || document.body.scrollLeft
+                || 0;
+    this.deltaY =  window.pageYOffset
+                || document.documentElement.scrollTop
+                || document.body.scrollTop
+                || 0;
+  },
+
+  realOffset: function(element) {
+    var valueT = 0, valueL = 0;
+    do {
+      valueT += element.scrollTop  || 0;
+      valueL += element.scrollLeft || 0;
+      element = element.parentNode;
+    } while (element);
+    return [valueL, valueT];
+  },
+
+  cumulativeOffset: function(element) {
+    var valueT = 0, valueL = 0;
+    do {
+      valueT += element.offsetTop  || 0;
+      valueL += element.offsetLeft || 0;
+      element = element.offsetParent;
+    } while (element);
+    return [valueL, valueT];
+  },
+
+  positionedOffset: function(element) {
+    var valueT = 0, valueL = 0;
+    do {
+      valueT += element.offsetTop  || 0;
+      valueL += element.offsetLeft || 0;
+      element = element.offsetParent;
+      if (element) {
+        p = Element.getStyle(element, 'position');
+        if (p == 'relative' || p == 'absolute') break;
+      }
+    } while (element);
+    return [valueL, valueT];
+  },
+
+  offsetParent: function(element) {
+    if (element.offsetParent) return element.offsetParent;
+    if (element == document.body) return element;
+
+    while ((element = element.parentNode) && element != document.body)
+      if (Element.getStyle(element, 'position') != 'static')
+        return element;
+
+    return document.body;
+  },
+
+  // caches x/y coordinate pair to use with overlap
+  within: function(element, x, y) {
+    if (this.includeScrollOffsets)
+      return this.withinIncludingScrolloffsets(element, x, y);
+    this.xcomp = x;
+    this.ycomp = y;
+    this.offset = this.cumulativeOffset(element);
+
+    return (y >= this.offset[1] &&
+            y <  this.offset[1] + element.offsetHeight &&
+            x >= this.offset[0] &&
+            x <  this.offset[0] + element.offsetWidth);
+  },
+
+  withinIncludingScrolloffsets: function(element, x, y) {
+    var offsetcache = this.realOffset(element);
+
+    this.xcomp = x + offsetcache[0] - this.deltaX;
+    this.ycomp = y + offsetcache[1] - this.deltaY;
+    this.offset = this.cumulativeOffset(element);
+
+    return (this.ycomp >= this.offset[1] &&
+            this.ycomp <  this.offset[1] + element.offsetHeight &&
+            this.xcomp >= this.offset[0] &&
+            this.xcomp <  this.offset[0] + element.offsetWidth);
+  },
+
+  // within must be called directly before
+  overlap: function(mode, element) {
+    if (!mode) return 0;
+    if (mode == 'vertical')
+      return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
+        element.offsetHeight;
+    if (mode == 'horizontal')
+      return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
+        element.offsetWidth;
+  },
+
+  clone: function(source, target) {
+    source = $(source);
+    target = $(target);
+    target.style.position = 'absolute';
+    var offsets = this.cumulativeOffset(source);
+    target.style.top    = offsets[1] + 'px';
+    target.style.left   = offsets[0] + 'px';
+    target.style.width  = source.offsetWidth + 'px';
+    target.style.height = source.offsetHeight + 'px';
+  },
+
+  page: function(forElement) {
+    var valueT = 0, valueL = 0;
+
+    var element = forElement;
+    do {
+      valueT += element.offsetTop  || 0;
+      valueL += element.offsetLeft || 0;
+
+      // Safari fix
+      if (element.offsetParent==document.body)
+        if (Element.getStyle(element,'position')=='absolute') break;
+
+    } while (element = element.offsetParent);
+
+    element = forElement;
+    do {
+      valueT -= element.scrollTop  || 0;
+      valueL -= element.scrollLeft || 0;
+    } while (element = element.parentNode);
+
+    return [valueL, valueT];
+  },
+
+  clone: function(source, target) {
+    var options = Object.extend({
+      setLeft:    true,
+      setTop:     true,
+      setWidth:   true,
+      setHeight:  true,
+      offsetTop:  0,
+      offsetLeft: 0
+    }, arguments[2] || {})
+
+    // find page position of source
+    source = $(source);
+    var p = Position.page(source);
+
+    // find coordinate system to use
+    target = $(target);
+    var delta = [0, 0];
+    var parent = null;
+    // delta [0,0] will do fine with position: fixed elements,
+    // position:absolute needs offsetParent deltas
+    if (Element.getStyle(target,'position') == 'absolute') {
+      parent = Position.offsetParent(target);
+      delta = Position.page(parent);
+    }
+
+    // correct by body offsets (fixes Safari)
+    if (parent == document.body) {
+      delta[0] -= document.body.offsetLeft;
+      delta[1] -= document.body.offsetTop;
+    }
+
+    // set position
+    if(options.setLeft)   target.style.left  = (p[0] - delta[0] + options.offsetLeft) + 'px';
+    if(options.setTop)    target.style.top   = (p[1] - delta[1] + options.offsetTop) + 'px';
+    if(options.setWidth)  target.style.width = source.offsetWidth + 'px';
+    if(options.setHeight) target.style.height = source.offsetHeight + 'px';
+  },
+
+  absolutize: function(element) {
+    element = $(element);
+    if (element.style.position == 'absolute') return;
+    Position.prepare();
+
+    var offsets = Position.positionedOffset(element);
+    var top     = offsets[1];
+    var left    = offsets[0];
+    var width   = element.clientWidth;
+    var height  = element.clientHeight;
+
+    element._originalLeft   = left - parseFloat(element.style.left  || 0);
+    element._originalTop    = top  - parseFloat(element.style.top || 0);
+    element._originalWidth  = element.style.width;
+    element._originalHeight = element.style.height;
+
+    element.style.position = 'absolute';
+    element.style.top    = top + 'px';;
+    element.style.left   = left + 'px';;
+    element.style.width  = width + 'px';;
+    element.style.height = height + 'px';;
+  },
+
+  relativize: function(element) {
+    element = $(element);
+    if (element.style.position == 'relative') return;
+    Position.prepare();
+
+    element.style.position = 'relative';
+    var top  = parseFloat(element.style.top  || 0) - (element._originalTop || 0);
+    var left = parseFloat(element.style.left || 0) - (element._originalLeft || 0);
+
+    element.style.top    = top + 'px';
+    element.style.left   = left + 'px';
+    element.style.height = element._originalHeight;
+    element.style.width  = element._originalWidth;
+  }
+}
+
+// Safari returns margins on body which is incorrect if the child is absolutely
+// positioned.  For performance reasons, redefine Position.cumulativeOffset for
+// KHTML/WebKit only.
+if (/Konqueror|Safari|KHTML/.test(navigator.userAgent)) {
+  Position.cumulativeOffset = function(element) {
+    var valueT = 0, valueL = 0;
+    do {
+      valueT += element.offsetTop  || 0;
+      valueL += element.offsetLeft || 0;
+      if (element.offsetParent == document.body)
+        if (Element.getStyle(element, 'position') == 'absolute') break;
+
+      element = element.offsetParent;
+    } while (element);
+
+    return [valueL, valueT];
+  }
+}
\ No newline at end of file