},  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 $(element).innerHTML.match(/^\s*$/);  },  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 (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;  }});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) {        if (this.element.tagName.toLowerCase() == 'tbody') {          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 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 (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;      if (!value && !('value' in opt))        value = opt.text;    }    return [element.name, value];  },  selectMany: function(element) {    var value = new Array();    for (var i = 0; i < element.length; i++) {      var opt = element.options[i];      if (opt.selected) {        var optValue = opt.value;        if (!optValue && !('value' in opt))          optValue = opt.text;        value.push(optValue);      }    }    return [element.name, value];  }}