/////////////AJAX动态加载页面【松鼠整理 2007.10.16】//////////////////
var bustcachevar=1; //bust potential caching of external pages after initial request? (1=yes, 0=no)
var loadstatustext="<center><img src='/dialogimg/loading.gif' /> 加载中,请耐心等待...</center>";
var useCacheDefault=false;

////NO NEED TO EDIT BELOW////////////////////////
var loadedobjects="";
var defaultcontentarray=new Object();
var bustcacheparameter="";

//返回一个UNIX时间戳，和PHP一样的
function time()
{
	var _dateObj=new Date();
	var _time=_dateObj.getTime().toString();
	return parseInt(_time.substring(0,_time.length-3));
};
//JS缓存类，用于缓存AJAX返回结果非常有用
function CacheHandler()
{
	this.data={};
	this.lifeTime=3600;//默认缓存一小时
	this.setLifeTime=function(lifeTime)
	{
		this.lifeTime=lifeTime;
	};
	this.save=function (name,value,lifeTime)
	{
		this.data[name]={expire:time()+(parseInt(lifeTime) || this.lifeTime),value:value};
		return this.data[name]['value'];
	};
	this.get=function (name)
	{
		if(this.data[name]==undefined || this.data[name]['expire']<time())return undefined;
		return this.data[name]['value'];
	};
	this.getOrSave=function(name,value,lifeTime)
	{
		return this.get(name)==undefined && this.save(name,value,lifeTime);
	};
	this.clear=function (name)
	{
		name?delete this.data[name]:this.data={};
	};
};
var Cache=new CacheHandler();//实例化个全局缓存对象

function ajaxpage(url, containerid, targetobj,onComplete,useCache)
{
	if(useCache==true)
	{
		if(Cache.get(url)!=undefined)
		{
			$(containerid).innerHTML=Cache.get(url);
			if(onComplete!=null)
			{
				try{eval(onComplete).apply(this,[Cache.get(url),containerid])};catch(e){alert('函数'+onComplete+'不存在。');};
			};
		};
	};
	if(Cache.get(url)==undefined)
	{
		var page_request = false;
		if (window.XMLHttpRequest) // if Mozilla, Safari etc
			page_request = new XMLHttpRequest();
		else if (window.ActiveXObject) // if IE
		{
			try 
			{
				page_request = new ActiveXObject("Msxml2.XMLHTTP");
			}; 
			catch (e)
			{
				try
				{
					page_request = new ActiveXObject("Microsoft.XMLHTTP");
				};
				catch (e)
				{};
			};
		};
		else
			return false;
	};
	/*
	*/
	if(targetobj!=null)
	{
		var ullist=targetobj.parentNode.parentNode.getElementsByTagName("li");
		for (var i=0; i<ullist.length; i++)
			ullist[i].className="";  //deselect all tabs
		targetobj.parentNode.className="selected";  //highlight currently clicked on tab
	};
	
	if (url.indexOf("#default")!=-1) //if simply show default content within container (verus fetch it via ajax)
	{
		$(containerid).innerHTML=defaultcontentarray[containerid];
		return;
	};
	if(Cache.get(url)==undefined)
	{
		$(containerid).innerHTML=loadstatustext;
		page_request.onreadystatechange=function()
		{
			loadpage(page_request, containerid,onComplete,useCache,url);
		};
		if (bustcachevar) //if bust caching of external page
			bustcacheparameter=(url.indexOf("?")!=-1)? "&"+new Date().getTime() : "?"+new Date().getTime();
		page_request.open('GET', url+bustcacheparameter, true);
		page_request.send(null);
	};
};

function loadpage(page_request, containerid,onComplete,useCache,url)
{
	if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1))
	{
		if(useCache==true)Cache.save(url,page_request.responseText);
		$(containerid).innerHTML=page_request.responseText;
		if(onComplete!=null)
		{
			try
			{
				eval(onComplete).apply(this,[page_request.responseText,containerid]);
			};
			catch(e)
			{
				alert('函数'+onComplete+'不存在。');
			};
		};
	};
};

function loadobjs(revattribute)
{
	if (revattribute!=null && revattribute!="") //if "rev" attribute is defined (load external .js or .css files)
	{
		var objectlist=revattribute.split(/\s*,\s*/); //split the files and store as array
		for (var i=0; i<objectlist.length; i++)
		{
			var file=objectlist[i];
			var fileref="";
			if (loadedobjects.indexOf(file)==-1)//Check to see if this object has not already been added to page before proceeding
			{ 
				if (file.indexOf(".js")!=-1)//If object is a js file
				{ 
					fileref=document.createElement('script');
					fileref.setAttribute("type","text/javascript");
					fileref.setAttribute("src", file);
				};
				else if (file.indexOf(".css")!=-1)//If object is a css file
				{ 
					fileref=document.createElement("link");
					fileref.setAttribute("rel", "stylesheet");
					fileref.setAttribute("type", "text/css");
					fileref.setAttribute("href", file);
				};
			};
			if (fileref!="")
			{
				document.getElementsByTagName("head").item(0).appendChild(fileref);
				loadedobjects+=file+" "; //Remember this object as being already added to page
			};
		};
	};
};

function savedefaultcontent(contentid)// save default ajax tab content
{
	if (typeof defaultcontentarray[contentid]=="undefined") //if default content hasn't already been saved
		defaultcontentarray[contentid]=$(contentid).innerHTML;
};

function startajaxtabs(ulId,useCache,onComplete)
{
	if(useCache==undefined)useCache=useCacheDefault;
	var ulobj=$(ulId);
	var ulist=ulobj.getElementsByTagName("li"); //array containing the LI elements within UL
	for (var x=0; x<ulist.length; x++) //loop through each LI element
	{
		var ulistlink=ulist[x].getElementsByTagName("a")[0];
		if (ulistlink.getAttribute("rel"))
		{
			var modifiedurl=ulistlink.getAttribute("href").replace(/^http:\/\/[^\/]+\//i, "http://"+window.location.hostname+"/");
			ulistlink.setAttribute("href", modifiedurl); //replace URL's root domain with dynamic root domain, for ajax security sake
			savedefaultcontent(ulistlink.getAttribute("rel")); //save default ajax tab content
			ulistlink.onclick=function()
			{
				ajaxpage(this.getAttribute("href"), this.getAttribute("rel"), this,onComplete || this.getAttribute("onComplete"),useCache);
				loadobjs(this.getAttribute("rev"));
				return false;
			};
			if (ulist[x].className=="selected")
			{
				ajaxpage(ulistlink.getAttribute("href"), ulistlink.getAttribute("rel"), ulistlink,onComplete || ulistlink.getAttribute("onComplete"),useCache); //auto load currenly selected tab content
				loadobjs(ulistlink.getAttribute("rev")); //auto load any accompanying .js and .css files
			};
		};
	};
};

//显示部分文本
function showPartText(eid,length,start,showMoreText)
{
	var obj=$(eid);
	if(obj.innerHTML.length<length)return false;
	obj.innerHTML=obj.innerHTML.replace(/<\/?[^>]+>/gi, '').substr(start,length)+showMoreText;
};

function loadajaxpage(href,targId,useCache,obj,onComplete)
{
	if(useCache==undefined)useCache=useCacheDefault;
	ajaxpage(href,targId,obj,onComplete,useCache);
	return false;
	
};