var cdn_sUrl = "http://pagespeed.report.qq.com/r.cgi?name=";
var cdn_pagetime ;
var cdn_pagestarttime;
var cdn_sPdName=null;
var cdn_iRate=10;

function cdn_beginCheck(name,rate)
{
	cdn_pagestarttime=new Date().getTime();  
	if(window.attachEvent){
	    window.attachEvent("onload",cdn_sendData);
	}
	else{
            window.addEventListener("load",cdn_sendData,false);
        }
	if(name) cdn_sPdName=name;
	if(rate) cdn_iRate=rate;
}
function cdn_sendData()
{
    if(cdn_sPdName==null)
    {
        var n=location.host.split(".qq.com")[0].split(".");
        n=n[n.length-1];
        cdn_sPdName=n.replace("test","")+"web";
    }
    var iModNum=100/cdn_iRate;
    var num = parseInt(iModNum*Math.random());      
    if( (num%iModNum) == 0)
	{
		cdn_pagetime = (new Date().getTime() - cdn_pagestarttime);
		cdn_sUrl += cdn_sPdName;
		cdn_sUrl += ("&1="+ cdn_pagetime);
		var oImg=document.createElement("img");       
		oImg.src=cdn_sUrl;
	}  
	if(window.attachEvent){
	    window.detachEvent("onload",cdn_sendData);
	}
	else{
            window.removeEventListener("load",cdn_sendData,false);
        }  
}

function cdn_checkLoad(name, rate)
{
    cdn_sPdName=name;
    cdn_iRate=rate;
}