// JavaScript Document
function closeDiv()
{
	document.getElementById('bellow_bg').style.display='none';
	document.getElementById('over_content').style.display='none';
}

function createDiv(title)
{
	var div=document.createElement('div');
	div.setAttribute('id','bellow_bg');
	div.setAttribute("class", 'bellow_bg');
	div.setAttribute("className", 'bellow_bg');
	var div1=document.createElement('div');
	div1.setAttribute('id','over_content');
	div1.setAttribute("class", 'over_content');
	div1.setAttribute("className", 'over_content');
	
	div1.innerHTML='<div class="top" id="top"><div class="title" id="ajaxtitle"> '+title+'</div><div class="close"><a href="javascript:;" onclick="closeDiv();">[关闭]</a></div></div><div class="ajaxcontent" id="ajaxcontent"></div>';
	
	document.body.insertBefore(div, document.body.firstChild);
	document.body.insertBefore(div1, document.body.firstChild);
	arrange_position();
}

function arrange_position()
{
	var div=document.getElementById('bellow_bg');
	var div1=document.getElementById('over_content');
	var content=document.getElementById('ajaxcontent');
	div.style.height=document.body.scrollHeight;
	div1.style.top=document.body.scrollTop+150;
	content.innerHTML='';
	div.style.display='block';
	div1.style.display='block';
}

function GetXmlHttpObject()
{
    var xmlHttpNew = null;
	try
	{
	    xmlHttpNew = new ActiveXObject("Msxml2.XMLHTTP");
	}
	catch(e)
	{
	    try
	    {
		    xmlHttpNew = new ActiveXObject("Microsoft.XMLHTTP");
		}
		catch(sc)
		{
			xmlHttpNew = null;
		}
	}
	  
	if( !xmlHttpNew && typeof XMLHttpRequest != "undefined" )
	{
	    xmlHttpNew = new XMLHttpRequest();
	}
	return xmlHttpNew;
}

function updatePage()
{
    try
    {
        var returnObj = document.getElementById(returnID);
	    if (xmlHttp.readyState == 1)
	    {
		    returnObj.innerHTML = "<img src='http://www.you88.net/images/loading.gif' /> 加载中，请稍候```";
	    }
	    if (xmlHttp.readyState == 2)
	    {
		    returnObj.innerHTML = "<img src='http://www.you88.net/images/loading.gif' /> 加载中，请稍候```";
	    }
	    if (xmlHttp.readyState == 3)
	    {
		    returnObj.innerHTML = "<img src='http://www.you88.net/images/loading.gif' /> 加载中，请稍候```";
	    }
	    if (xmlHttp.readyState == 4)
	    {   
		    var response = xmlHttp.responseText;
		    if(returnObj!=null)
		    {
			    if(returnObj.tagName=='INPUT')
			    {
				    returnObj.value=response ;
			    }
			    else
			    {
				    returnObj.innerHTML=response ;
			    }
		    }
	    }
    }
	catch(e)
	{
        var returnObj = document.getElementById(returnID);
		if(returnObj!=null)
		{
		    if(returnObj.tagName=='INPUT')
			{
			    returnObj.value="错误:" + e ;
			}
			else
			{
			    returnObj.innerHTML="错误:" + e ;
			}
		}
    }
}
function getOs()   
{   
    var OsObject = "";   
    if(navigator.userAgent.indexOf("MSIE")>0)
    {   
        return "MSIE";       //IE浏览器
    }
    if(isFirefox=navigator.userAgent.indexOf("Firefox")>0)
    {   
        return "Firefox";     //Firefox浏览器
    }
    if(isSafari=navigator.userAgent.indexOf("Safari")>0)
    {   
        return "Safari";      //Safan浏览器
    }
    if(isCamino=navigator.userAgent.indexOf("Camino")>0)
    {   
        return "Camino";   //Camino浏览器
    }
    if(isMozilla=navigator.userAgent.indexOf("Gecko/")>0)
    {   
        return "Gecko";    //Gecko浏览器
    }   
} 

var xmlHttp=null;
var returnID=null;
function checkSelect(URL,title,returnid,makediv,cache)
{
    if(typeof(cache) == 'undefined')
	{
		cache=true;
	}
	var synchronization=false;
	if(makediv)
	{
        if(!document.getElementById('bellow_bg'))
		{	
			createDiv(title);	
		}
		else
		{
			document.getElementById("ajaxtitle").innerHTML=title;
		}
		arrange_position();
		synchronization=false;
	}
	returnID=returnid;
    try
    {
	    xmlHttp = GetXmlHttpObject();
	    if(xmlHttp)
	    {
			var btype=getOs();
			xmlHttp.onreadystatechange = (btype!="Firefox")?(updatePage):(updatePage());
			xmlHttp.open("get", URL, synchronization);
			if(!cache)
			{
				xmlHttp.setRequestHeader("If-Modified-Since","0");
			}
			xmlHttp.send(null);
			//在firefox下，不会等到onreadystatechange执行完毕后才继续，所以下面还要补上一句再获取一次
			xmlHttp.onreadystatechange = (btype!="Firefox")?(updatePage):(updatePage());
	    }
	    else
	    {
            document.getElementById(returnid).innerHTML = "xmlHttp对象创建失败";
        }
    }
    catch (e)
    {
	    document.getElementById(returnid).innerHTML = "错误:" + e;
    }
}

function getElementByClassName(name,obj)
{
	checkNode(obj,name.toLowerCase(),arr=new Array());
	return arr;
}

function checkNode(node,cname,arr)
{
	if(node.hasChildNodes())
	{
		var obj=node.childNodes;
		for(var i=0;i<obj.length;checkNode(obj[i],cname,arr),i++);
	}
	try
	{
		if(node.className!=null)
		{
			var cnames=node.className.split(' '); 
			for(var i=0;i<cnames.length;(cnames[i].toLowerCase()==cname)?arr.push(node):null,i++);
		}
	}
	catch(err){}
}