var property = pair.first(), attribute = pair.last();      var value = (element[property] || '').toString();      if (value) result += ' ' + attribute + '=' + value.inspect(true);    });    return result + '>';  },  recursivelyCollect: function(element, property) {    element = $(element);    var elements = [];    while (element = element[property])      if (element.nodeType == 1)        elements.push(Element.extend(element));    return elements;  },  ancestors: function(element) {    return $(element).recursivelyCollect('parentNode');  },  descendants: function(element) {    return $A($(element).getElementsByTagName('*')).each(Element.extend);  },  firstDescendant: function(element) {    element = $(element).firstChild;    while (element && element.nodeType != 1) element = element.nextSibling;    return $(element);  },  immediateDescendants: function(element) {    if (!(element = $(element).firstChild)) return [];    while (element && element.nodeType != 1) element = element.nextSibling;    if (element) return [element].concat($(element).nextSiblings());    return [];  },  previousSiblings: function(element) {    return $(element).recursivelyCollect('previousSibling');  },  nextSiblings: function(element) {    return $(element).recursivelyCollect('nextSibling');  },  siblings: function(element) {    element = $(element);    return element.previousSiblings().reverse().concat(element.nextSiblings());  },  match: function(element, selector) {    if (typeof selector == 'string')      selector = new Selector(selector);    return selector.match($(element));  },  up: function(element, expression, index) {    element = $(element);    if (arguments.length == 1) return $(element.parentNode);    var ancestors = element.ancestors();    return expression ? Selector.findElement(ancestors, expression, index) :      ancestors[index || 0];  },  down: function(element, expression, index) {    element = $(element);    if (arguments.length == 1) return element.firstDescendant();    var descendants = element.descendants();    return expression ? Selector.findElement(descendants, expression, index) :      descendants[index || 0];  },  previous: function(element, expression, index) {    element = $(element);    if (arguments.length == 1) return $(Selector.handlers.previousElementSibling(element));    var previousSiblings = element.previousSiblings();    return expression ? Selector.findElement(previousSiblings, expression, index) :      previousSiblings[index || 0];  },  next: function(element, expression, index) {    element = $(element);    if (arguments.length == 1) return $(Selector.handlers.nextElementSibling(element));    var nextSiblings = element.nextSiblings();    return expression ? Selector.findElement(nextSiblings, expression, index) :      nextSiblings[index || 0];  },  getElementsBySelector: function() {    var args = $A(arguments), element = $(args.shift());    return Selector.findChildElements(element, args);  },  getElementsByClassName: function(element, className) {    return document.getElementsByClassName(className, element);  },  readAttribute: function(element, name) {    element = $(element);    if (Prototype.Browser.IE) {      if (!element.attributes) return null;      var t = Element._attributeTranslations;      if (t.values[name]) return t.values[name](element, name);      if (t.names[name])  name = t.names[name];      var attribute = element.attributes[name];      return attribute ? attribute.nodeValue : null;    }    return element.getAttribute(name);  },  getHeight: function(element) {    return $(element).getDimensions().height;  },  getWidth: function(element) {    return $(element).getDimensions().width;  },  classNames: function(element) {    return new Element.ClassNames(element);  },  hasClassName: function(element, className) {    if (!(element = $(element))) return;    var elementClassName = element.className;    if (elementClassName.length == 0) return false;    if (elementClassName == className ||        elementClassName.match(new RegExp("(^|\\s)" + className + "(\\s|$)")))      return true;    return false;  },  addClassName: function(element, className) {    if (!(element = $(element))) return;    Element.classNames(element).add(className);    return element;  },  removeClassName: function(element, className) {    if (!(element = $(element))) return;    Element.classNames(element).remove(className);    return element;  },  toggleClassName: function(element, className) {    if (!(element = $(element))) return;    Element.classNames(element)[element.hasClassName(className) ? 'remove' : 'add'](className);    return element;  },  observe: function() {    Event.observe.apply(Event, arguments);    return $A(arguments).first();  },  stopObserving: function() {    Event.stopObserving.apply(Event, arguments);    return $A(arguments).first();  },  // removes whitespace-only text node children  cleanWhitespace: function(element) {    element = $(element);    var node = element.firstChild;    while (node) {      var nextNode = node.nextSibling;      if (node.nodeType == 3 && !/\S/.test(node.nodeValue))        element.removeChild(node);      node = nextNode;    }    return element;  },  empty: function(element) {    return $(element).innerHTML.blank();  },  descendantOf: function(element, ancestor) {    element = $(element), ancestor = $(ancestor);    while (element = element.parentNode)      if (element == ancestor) return true;    return false;  },  scrollTo: function(element) {    element = $(element);    var pos = Position.cumulativeOffset(element);    window.scrollTo(pos[0], pos[1]);    return element;  },  getStyle: function(element, style) {    element = $(element);    style = style == 'float' ? 'cssFloat' : style.camelize();    var value = element.style[style];    if (!value) {      var css = document.defaultView.getComputedStyle(element, null);      value = css ? css[style] : null;    }    if (style == 'opacity') return value ? parseFloat(value) : 1.0;    return value == 'auto' ? null : value;  },  getOpacity: function(element) {    return $(element).getStyle('opacity');  },  setStyle: function(element, styles, camelized) {    element = $(element);    var elementStyle = element.style;    for (var property in styles)      if (property == 'opacity') element.setOpacity(styles[property])      else        elementStyle[(property == 'float' || property == 'cssFloat') ?          (elementStyle.styleFloat === undefined ? 'cssFloat' : 'styleFloat') :          (camelized ? property : property.camelize())] = styles[property];    return element;  },  setOpacity: function(element, value) {    element = $(element);    element.style.opacity = (value == 1 || value === '') ? '' :      (value < 0.00001) ? 0 : value;    return element;  },  getDimensions: function(element) {    element = $(element);    var display = $(element).getStyle('display');    if (display != 'none' && display != null) // Safari bug      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;    var originalDisplay = els.display;    els.visibility = 'hidden';    els.position = 'absolute';    els.display = 'block';    var originalWidth = element.clientWidth;    var originalHeight = element.clientHeight;    els.display = originalDisplay;    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;      }    }    return element;  },  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 = '';    }    return element;  },  makeClipping: function(element) {    element = $(element);    if (element._overflow) return element;    element._overflow = element.style.overflow || 'auto';    if ((Element.getStyle(element, 'overflow') || 'visible') != 'hidden')      element.style.overflow = 'hidden';    return element;  },  undoClipping: function(element) {    element = $(element);    if (!element._overflow) return element;    element.style.overflow = element._overflow == 'auto' ? '' : element._overflow;    element._overflow = null;    return element;  }};Object.extend(Element.Methods, {  childOf: Element.Methods.descendantOf,  childElements: Element.Methods.immediateDescendants});if (Prototype.Browser.Opera) {  Element.Methods._getStyle = Element.Methods.getStyle;  Element.Methods.getStyle = function(element, style) {    switch(style) {      case 'left':      case 'top':      case 'right':      case 'bottom':        if (Element._getStyle(element, 'position') == 'static') return null;      default: return Element._getStyle(element, style);    }  };}else if (Prototype.Browser.IE) {  Element.Methods.getStyle = function(element, style) {    element = $(element);    style = (style == 'float' || style == 'cssFloat') ? 'styleFloat' : style.camelize();    var value = element.style[style];    if (!value && element.currentStyle) value = element.currentStyle[style];    if (style == 'opacity') {      if (value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))        if (value[1]) return parseFloat(value[1]) / 100;      return 1.0;    }    if (value == 'auto') {      if ((style == 'width' || style == 'height') && (element.getStyle('display') != 'none'))        return element['offset'+style.capitalize()] + 'px';      return null;    }    return value;  };  Element.Methods.setOpacity = function(element, value) {    element = $(element);    var filter = element.getStyle('filter'), style = element.style;    if (value == 1 || value === '') {      style.filter = filter.replace(/alpha\([^\)]*\)/gi,'');      return element;    } else if (value < 0.00001) value = 0;    style.filter = filter.replace(/alpha\([^\)]*\)/gi, '') +      'alpha(opacity=' + (value * 100) + ')';    return element;  };  // IE is missing .innerHTML support for TABLE-related elements  Element.Methods.update = function(element, html) {    element = $(element);    html = typeof html == 'undefined' ? '' : html.toString();    var tagName = element.tagName.toUpperCase();    if (['THEAD','TBODY','TR','TD'].include(tagName)) {      var div = document.createElement('div');      switch (tagName) {        case 'THEAD':        case 'TBODY':          div.innerHTML = '<table><tbody>' +  html.stripScripts() + '</tbody></table>';          depth = 2;          break;        case 'TR':          div.innerHTML = '<table><tbody><tr>' +  html.stripScripts() + '</tr></tbody></table>';          depth = 3;          break;        case 'TD':          div.innerHTML = '<table><tbody><tr><td>' +  html.stripScripts() + '</td></tr></tbody></table>';          depth = 4;      }      $A(element.childNodes).each(function(node) { element.removeChild(node) });      depth.times(function() { div = div.firstChild });      $A(div.childNodes).each(function(node) { element.appendChild(node) });    } else {      element.innerHTML = html.stripScripts();    }    setTimeout(function() { html.evalScripts() }, 10);    return element;  }}else if (Prototype.Browser.Gecko) {  Element.Methods.setOpacity = function(element, value) {    element = $(element);    element.style.opacity = (value == 1) ? 0.999999 :      (value === '') ? '' : (value < 0.00001) ? 0 : value;    return element;  };}Element._attributeTranslations = {  names: {    colspan:   "colSpan",    rowspan:   "rowSpan",    valign:    "vAlign",    datetime:  "dateTime",    accesskey: "accessKey",    tabindex:  "tabIndex",    enctype:   "encType",    maxlength: "maxLength",    readonly:  "readOnly",    longdesc:  "longDesc"  },  values: {    _getAttr: function(element, attribute) {      return element.getAttribute(attribute, 2);    },    _flag: function(element, attribute) {      return $(element).hasAttribute(attribute) ? attribute : null;    },    style: function(element) {      return element.style.cssText.toLowerCase();    },    title: function(element) {      var node = element.getAttributeNode('title');      return node.specified ? node.nodeValue : null;    }  }};(function() {  Object.extend(this, {    href: this._getAttr,    src:  this._getAttr,    type: this._getAttr,    disabled: this._flag,    checked:  this._flag,    readonly: this._flag,    multiple: this._flag  });}).call(Element._attributeTranslations.values);Element.Methods.Simulated = {  hasAttribute: function(element, attribute) {    var t = Element._attributeTranslations, node;    attribute = t.names[attribute] || attribute;    node = $(element).getAttributeNode(attribute);    return node && node.specified;  }};Element.Methods.ByTag = {};Object.extend(Element, Element.Methods);if (!Prototype.BrowserFeatures.ElementExtensions && document.createElement('div').__proto__) {  window.HTMLElement = {};  window.HTMLElement.prototype = document.createElement('div').__proto__;  Prototype.BrowserFeatures.ElementExtensions = true;}Element.hasAttribute = function(element, attribute) {  if (element.hasAttribute) return element.hasAttribute(attribute);  return Element.Methods.Simulated.hasAttribute(element, attribute);};Element.addMethods = function(methods) {  var F = Prototype.BrowserFeatures, T = Element.Methods.ByTag;