/*
 * lib common classes v1.0 beta build 090210 copyright (c) 2009 ilwave ce. http://ilwave.spaces.live.com
 *
 * this class is part of lib - a javascript library which is still on designing, and is an extend copy of class "object" in lib.
 *
 */

var object = { // 类的最基本原型

	extend: function(odefine)
	{
		!odefine && (odefine = {}); // 如果odefine参数为空则返回的是一个object副本

		var oextendclass = function() {
			for (var eachmember in odefine) this[eachmember] = odefine[eachmember];
		}

		oextendclass.prototype = this; //这里的this是指object

		return (new oextendclass());
	},

	new: function()
	{
		var aparams = [];
		
		for (var i=0; i<arguments.length; i++) {
			aparams.push(arguments[i]);
		}

		var onewinstance = function() { //将arguments对象转换成aparams数组之后传入到新实例中作为构造参数
			this.construct && this.construct.apply(this, aparams);
		};

		onewinstance.prototype = this;
		
		return (new onewinstance());
	}
	
};

var page = object.extend({
	
	/*
	 * 检测浏览器环境，根据不同浏览器的特有内置对象支持来判断，结果如下：
	 *
	 * 1: ie6 或更早版本
	 * 2: ie7 或更新版本
	 * 3: firefox
	 * 4: safari 或 chrome
	 * 5: opera
	 *
	 * 使用方法：var inav = page.navigator;
	 *
	 */
	
	navigator: window.activexobject ? window.xmlhttprequest ? 2 : 1 : window.opera ? 5 : navigator.useragent.indexof("khtml") == -1 ? 3 : 4,


	/*
	 * 页面载入完成之后要运行的函数队列
	 *
	 * 使用方法：page.onload.push(function(){...});
	 *
	 */
	
	onload: [],
	
	
	/*
	 *
	 *
	 *
	 */
	
	joblist: [],
	
	
	/*
	 *
	 *
	 *
	 */
	 
	_ojobtimeout: null,


	/*
	 * 获取dom中的head元素
	 *
	 * 使用方法：var ohead = page.getheadelement();
	 *
	 */
	
	getheadelement: function()
	{
		return document.getelementsbytagname('head')[0];
	},
	
	
	/*
	 * 动态添加head中的元素
	 *
	 * stagname 元素名称，如 link、script等；
	 * oattrs 属性列表，如 {"type": "text/javascript", "src": "common.js"}；
	 * fonload (可选) 回调函数，元素载入完成后执行
	 *
	 */
	
	loadheadelement: function(stagname, oattrs, fonload)
	{
		var newelement = document.createelement(stagname);
		
		for (var seachattr in oattrs)
		{
			newelement.setattribute(seachattr, oattrs[seachattr]);
		}
		
		if (typeof(fonload) == "function")
		{
			if(this.navigator < 3) // ie
			{
				newelement.onreadystatechange = function()
				{
					if (this.readystate == 'loaded' || this.readystate == 'complete')
					{
						fonload();
					}
				};
			}
			else // mozilla like
			{
				newelement.onload = function()
				{
					fonload();
				};
			}
		}
		
		this.getheadelement().appendchild(newelement);
	},
	
	/*
	 * 载入 js 脚本
	 *
	 * ssrc 脚本路径
	 * fonload (可选) 回调函数
	 *
	 */
	
	loadscript: function(ssrc, fonload)
	{
		this.loadheadelement("script", {"type": "text/javascript", "src": ssrc}, fonload);
	},
	
	
	/*
	 * 载入 css 样式表
	 *
	 * shref 样式表路径
	 * fonload (可选) 回调函数
	 *
	 */
	
	loadstyle: function(shref, fonload)
	{	
		this.loadheadelement("link", {"type": "text/css", "rel": "stylesheet", "href": shref}, fonload);
	},
	
	/*
	 * 设置 cookie
	 *
	 * oitems = {
	 *	name: "sname",
	 *	value: "svalue",
	 *	expires: ndays,
	 *	path: "spath"
	 *	domain: "sdomain"
	 * };
	 *
	 */
	
	setcookie: function(oitems)
	{
		var sdate = (new date()).gettime() + (oitems.expires || 0) * 86400000;
		
		var acookie = [];
		
			oitems.name && acookie.push(oitems.name + "=" + escape(oitems.value));
			oitems.expires && acookie.push("expires=" + (new date(sdate)).togmtstring());
			oitems.path && acookie.push("path=" + oitems.path);
			oitems.domain && acookie.push("domain=" + oitems.domain);
		
		document.cookie = acookie.join(";");
	},
	
	/*
	 * 获取 cookie 的值
	 *
	 */
	
	getcookie: function(sname)
	{
		var svalue = document.cookie.match(new regexp("(^| )" + sname + "=([^;]*)(;|$)"));
		
		return svalue ? unescape(svalue[2]) : null;
	},
	
	/*
	 * 删除 cookie
	 *
	 */
	
	delcookie: function(sname)
	{
		this.setcookie({name: sname, value: "", expires: -1});
	},
	
	dojob: function()
	{
		if (this.joblist.length ==0) {
			return false;
		}

		var arrcurrjob = this.joblist.shift();
		this._ojobtimeout = window.settimeout(function(){eval(arrcurrjob[0]); page.dojob();}, arrcurrjob[1]);
	}

});

var style = object.extend({
	
	pick: function(oelement, sproperty)
	{
		var bisw3cmode = document.defaultview && document.defaultview.getcomputedstyle;
		var _sproperty = sproperty;
		
		if (_sproperty == "float") _sproperty = bisw3cmode ? "cssfloat" : "stylefloat";
		
		if (bisw3cmode) {

			var ostyle = document.defaultview.getcomputedstyle(oelement, '');
			
			return oelement.style[sproperty] || ostyle[sproperty];
		}
		else
		{
			return(oelement.style[sproperty] || oelement.currentstyle[sproperty]);
		}
	}
	
});

window.onload = function()
{
	for(var eachfunction in page.onload)
	{
		page.onload[eachfunction]();
	}
};

var _ = function(sid){return document.getelementbyid(sid);};