easyloader.js源码阅读
想找一份好的jsui 来做软件的外壳，最好是原创的，看了不少jquery代码，发现了不少的jqueryplugins.但是都比较零散，唯独jquery easyui ,比较系统。
功能和元素都比较全，自己想写一套类似的，可惜现在功力还不行。所以先学习easy-ui的源码吧。今天看了里面的第一个类。eayload。当然看这个源码之前，最好将jquery源码先读一遍。因为easyui是基于jquery写的。如果想对jquery 深入了解，最好下一番功夫在ec-262-3上，详读后会对scope ,excute-context ,this等有更深入了解。

好了 言归正传，easyloader.js可以说是easyui的最基础的一个类，它负责加载js,css,以及locale文件，里面的结构比较简单，

/**
 * easyloader - jQuery EasyUI
 * 
 * Licensed under the GPL:
 *   http://www.gnu.org/licenses/gpl.txt
 *
 * Copyright 2010 stworthy [ stworthy@gmail.com ] 
 * 
 */
(function(){
	//将所有的插件，和插件资源和依赖文件放进modules对象中。
	var modules = {
		
		draggable:{
			js:'jquery.draggable.js'
		},
		droppable:{
			js:'jquery.droppable.js'
		},
		resizable:{
			js:'jquery.resizable.js'
		},
		linkbutton:{
			js:'jquery.linkbutton.js',
			css:'linkbutton.css'
		},
		pagination:{
			js:'jquery.pagination.js',
			css:'pagination.css',
			dependencies:['linkbutton']
		},
		datagrid:{
			js:'jquery.datagrid.js',
			css:'datagrid.css',
			dependencies:['panel','resizable','linkbutton','pagination']
		},
		treegrid:{
			js:'jquery.treegrid.js',
			css:'tree.css',
			dependencies:['datagrid']
		},
		panel: {
			js:'jquery.panel.js',
			css:'panel.css'
		},
		window:{
			js:'jquery.window.js',
			css:'window.css',
			dependencies:['resizable','draggable','panel']
		},
		dialog:{
			js:'jquery.dialog.js',
			css:'dialog.css',
			dependencies:['linkbutton','window']
		},
		messager:{
			js:'jquery.messager.js',
			css:'messager.css',
			dependencies:['linkbutton','window']
		},
		layout:{
			js:'jquery.layout.js',
			css:'layout.css',
			dependencies:['resizable','panel']
		},
		form:{
			js:'jquery.form.js'
		},
		menu:{
			js:'jquery.menu.js',
			css:'menu.css'
		},
		tabs:{
			js:'jquery.tabs.js',
			css:'tabs.css',
			dependencies:['panel','linkbutton']
		},
		splitbutton:{
			js:'jquery.splitbutton.js',
			css:'splitbutton.css',
			dependencies:['linkbutton','menu']
		},
		menubutton:{
			js:'jquery.menubutton.js',
			css:'menubutton.css',
			dependencies:['linkbutton','menu']
		},
		accordion:{
			js:'jquery.accordion.js',
			css:'accordion.css',
			dependencies:['panel']
		},
		calendar:{
			js:'jquery.calendar.js',
			css:'calendar.css'
		},
		combo:{
			js:'jquery.combo.js',
			css:'combo.css',
			dependencies:['panel','validatebox']
		},
		combobox:{
			js:'jquery.combobox.js',
			css:'combobox.css',
			dependencies:['combo']
		},
		combotree:{
			js:'jquery.combotree.js',
			dependencies:['combo','tree']
		},
		combogrid:{
			js:'jquery.combogrid.js',
			dependencies:['combo','datagrid']
		},
		validatebox:{
			js:'jquery.validatebox.js',
			css:'validatebox.css'
		},
		numberbox:{
			js:'jquery.numberbox.js',
			dependencies:['validatebox']
		},
		spinner:{
			js:'jquery.spinner.js',
			css:'spinner.css',
			dependencies:['validatebox']
		},
		numberspinner:{
			js:'jquery.numberspinner.js',
			dependencies:['spinner','numberbox']
		},
		timespinner:{
			js:'jquery.timespinner.js',
			dependencies:['spinner']
		},
		tree:{
			js:'jquery.tree.js',
			css:'tree.css',
			dependencies:['draggable','droppable']
		},
		datebox:{
			js:'jquery.datebox.js',
			css:'datebox.css',
			dependencies:['calendar','validatebox']
		},
		parser:{
			js:'jquery.parser.js'
		}
	};
	//将国际化文件放入一个locales对象中
	var locales = {
		'af':'easyui-lang-af.js',
		'bg':'easyui-lang-bg.js',
		'ca':'easyui-lang-ca.js',
		'cs':'easyui-lang-cs.js',
		'da':'easyui-lang-da.js',
		'de':'easyui-lang-de.js',
		'en':'easyui-lang-en.js',
		'fr':'easyui-lang-fr.js',
		'nl':'easyui-lang-nl.js',
		'zh_CN':'easyui-lang-zh_CN.js',
		'zh_TW':'easyui-lang-zh_TW.js'
	};
	
	//定义一个局部变量，做循环遍历时候，存放状态
	var queues = {};
	
	//加载js方法
	function loadJs(url, callback){
		//标志变量，js是否加载并执行
		var done = false;
		var script = document.createElement('script');//创建script dom
		script.type = 'text/javascript';
		script.language = 'javascript';
		script.src = url;
		script.onload = script.