controls.js

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      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
//
// The constructor takes three parameters. The first is the element
// that should support in-place editing. The second is the url to submit
// the changed value to. The server should respond with the updated
// value (the server might have post-processed it or validation might
// have prevented it from changing). The third is a hash of options.
//
// Supported options are (all are optional and have sensible defaults):
// - okText - The text of the submit button that submits the changed value
//            to the server (default: "ok")
// - cancelText - The text of the link that cancels editing (default: "cancel")
// - savingText - The text being displayed as the AJAX engine communicates
//                with the server (default: "Saving...")
// - formId - The id given to the <form> element
//            (default: the id of the element to edit plus '-inplaceeditor')

Ajax.InPlaceEditor = Class.create();
Ajax.InPlaceEditor.prototype = {
  initialize: function(element, url, options) {
    this.url = url;
    this.element = $(element);

    this.options = Object.extend({
      okText: "ok",
      cancelText: "cancel",
      savingText: "Saving...",
      okText: "ok",
      rows: 1,
      onFailure: function(transport) {
        alert("Error communicating with the server: " + transport.responseText);
      },
      callback: function(form) {
        return Form.serialize(form);
      },
      hoverClassName: 'inplaceeditor-hover',
      externalControl:	null
    }, 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.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);
    }
  },
  enterEditMode: function() {
    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.form = this.getForm();
    this.element.parentNode.insertBefore(this.form, this.element);
  },
  getForm: function() {
    form = document.createElement("form");
    form.id = this.options.formId;
    form.onsubmit = this.onSubmit.bind(this);

    this.createEditField(form);

    if (this.options.textarea) {
      var br = document.createElement("br");
      form.appendChild(br);
    }

    okButton = document.createElement("input");
    okButton.type = "submit";
    okButton.value = this.options.okText;
    form.appendChild(okButton);

    cancelLink = document.createElement("a");
    cancelLink.href = "#";
    cancelLink.appendChild(document.createTextNode(this.options.cancelText));
    cancelLink.onclick = this.onclickCancel.bind(this);
    form.appendChild(cancelLink);
    return form;
  },
  createEditField: function(form) {
    if (this.options.rows == 1) {
      this.options.textarea = false;
      var textField = document.createElement("input");
      textField.type = "text";
      textField.name = "value";
      textField.value = this.getText();
      var size = this.options.size || this.options.cols || 0;
      if (size != 0)
        textField.size = size;
      form.appendChild(textField);
    } else {
      this.options.textarea = true;
      var textArea = document.createElement("textarea");
      textArea.name = "value";
      textArea.value = this.getText();
      textArea.rows = this.options.rows;
      textArea.cols = this.options.cols || 40;
      form.appendChild(textArea);
    }
  },
  getText: function() {
    return this.element.innerHTML;
  },
  onclickCancel: function() {
    this.onComplete();
  },
  onFailure: function(transport) {
    this.options.onFailure(transport);
    if (this.oldInnerHTML) {
      this.element.innerHTML = this.oldInnerHTML;
      this.oldInnerHTML = null;
    }
    return false;
    if (this.oldInnerHTML) {
      this.element.innerHTML = this.oldInnerHTML;
      this.oldInnerHTML = null;
    }
  },
  onSubmit: function() {
    this.saving = true;
    new Ajax.Updater(
      { 
        success: this.element,
         // don't update on failure (this could be an option)
        failure: null
      },
      this.url,
      {
        parameters: this.options.callback(this.form, this.form.value.value),
        onComplete: this.onComplete.bind(this),
        onFailure: this.onFailure.bind(this)
      }
    );
    this.onLoading();
    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.show(this.element);
  },
  removeForm: function() {
    if(this.form) {
      Element.remove(this.form);
      this.form = null;
    }
  },
  enterHover: function() {
    if (this.saving) return;
    if (this.options.backgroundColor) {
      this.oldBackground = this.element.style.backgroundColor;
      this.element.style.backgroundColor = this.options.backgroundColor;
    }
    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)
  },
  leaveEditMode: function() {
    if(this.savingText) {
      Element.remove(this.savingText);
      this.savingText = null;
    }
    this.removeForm();
    this.leaveHover();
    Element.show(this.element);
    if (this.options.externalControl) {
      Element.show(this.options.externalControl);
    }
    this.editing = false;
    this.onLeaveEditMode();
  },
  onComplete: function() {
    this.leaveEditMode();
    this.oldInnerHTML = null;
    this.saving = false;
  },
  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);
    }
  }
};