[效果]JS折叠菜单-prototype.lite.js

/*  Prototype JavaScript framework
 *  (c) 2005 Sam Stephenson <[e-mail]>
 *  Prototype is freely distributable under the terms of an MIT-style license.
 *  For details, see the Prototype web site: http://prototype.conio.net/
/*--------------------------------------------------------------------------*/

//note: modified & stripped down version of prototype, to be used with moo.fx by mad4milk (http://moofx.mad4milk.net).

var Class = {
 create: function() {
  return function() {
   this.initialize.apply(this, arguments);
  }
 }
}

Object.extend = function(destination, source) {
 for (property in source) destination[property] = source[property];
 return destination;
}

Function.prototype.bind = function(object) {
 var __method = this;
 return function() {
  return __method.apply(object, arguments);
 }
}

Function.prototype.bindAsEventListener = function(object) {
var __method = this;
 return function(event) {
  __method.call(object, event || window.event);
 }
}

function $() {
 if (arguments.length == 1) return get$(arguments[0]);
 var elements = [];
 $c(arguments).each(function(el){
  elements.push(get$(el));
 });
 return elements;

 function get$(el){
  if (typeof el == 'string') el = document.getElementById(el);
  return el;
 }
}

if (!window.Element) var Element = new Object();

Object.extend(Element, {
 remove: function(element) {
  element = $(element);
  element.parentNode.removeChild(element);
 },

 hasClassName: function(element, className) {
  element = $(element);
  if (!element) return;
  var hasClass = false;
  element.className.split(' ').each(function(cn){
   if (cn == className) hasClass = true;
  });
  return hasClass;
 },

 addClassName: function(element, className) {
  element = $(element);
  Element.removeClassName(element, className);
  element.className += ' ' + className;
 },
 
 removeClassName: function(element, className) {
  element = $(element);
  if (!element) return;
  var newClassName = '';
  element.className.split(' ').each(function(cn, i){
   if (cn != className){
    if (i > 0) newClassName += ' ';
    newClassName += cn;
   }
  });
  element.className = newClassName;
 },

 cleanWhitespace: function(element) {
  element = $(element);
  $c(element.childNodes).each(function(node){
   if (node.nodeType == 3 && !//S/.test(node.nodeValue)) Element.remove(node);
  });
 },

 find: function(element, what) {
  element = $(element)[what];
  while (element.nodeType != 1) element = element[what];
  return element;
 }
});

var Position = {
 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];
 }
};

document.getElementsByClassName = function(className) {
 var children = document.getElementsByTagName('*') || document.all;
 var elements = [];
 $c(children).each(function(child){
  if (Element.hasClassName(child, className)) elements.push(child);
 }); 
 return elements;
}

//useful array functions
Array.prototype.iterate = function(func){
 for(var i=0;i<this.length;i++) func(this[i], i);
}
if (!Array.prototype.each) Array.prototype.each = Array.prototype.iterate;

function $c(array){
 var nArray = [];
 for (var i=0;i<array.length;i++) nArray.push(array[i]);
 return nArray;
}