var showad = true;        //是否显示广告 
var Toppx = 420;            //上端位置 
var AdDivW = 110;        //宽度 
var AdDivH = 200;        //高度 
var PageWidth = 800;    //页面多少宽度象素下正好不出现左右滚动条 
var MinScreenW = 1024;    //显示广告的最小屏幕宽度象素 
//var url=""
//var src=""
//var title=""
var ClosebuttonHtml = '<div align="right" style="position: absolute;top:202px;right:0px;margin:2px;padding:2px;z-index:2000;"><a href="javascript:;" onclick="hidead()" style="color:red;text-decoration:none;font-size:12px;">关闭</a></div>' 
ClosebuttonHtml=""
var AdContentHtml = '<div align="center" ><a href="'+url+'" title="'+title+'"><img src="'+src+'" alt="'+title+'" border="0"/></a></div>'; 

document.write ('<div id="Javascript.LeftDiv" style="position: absolute;border: 0px solid #336699;z-index:1000;width:'+AdDivW+'px;height:'+AdDivH+'px;top:-1000px;word-break:break-all;display:none;">'+ClosebuttonHtml+'<div>'+AdContentHtml+'</div></div>'); 
//document.write ('<div id="Javascript.RightDiv" style="position: absolute;border: 0px solid #336699;z-index:1000;width:'+AdDivW+'px;height:'+AdDivH+'px;top:-1000px;word-break:break-all;display:none;">'+ClosebuttonHtml+'<div>'+AdContentHtml+'</div></div>'); 

function scall(){ 
	if(!showad){return;} 
	if (window.screen.width<MinScreenW){ 
		//alert("临时提示:\n\n显示器分辨率宽度小于"+MinScreenW+",不显示广告"); 
		showad = false; 
		document.getElementById("Javascript.LeftDiv").style.display="none"; 
		//document.getElementById("Javascript.RightDiv").style.display="none"; 
		return; 
	} 
	var Borderpx = ((window.screen.width-PageWidth)/2-AdDivW)/2; 
	document.getElementById("Javascript.LeftDiv").style.display=""; 
	document.getElementById("Javascript.LeftDiv").style.top=(document.documentElement.scrollTop+Toppx)+"px"; 
	document.getElementById("Javascript.LeftDiv").style.left=(document.documentElement.scrollLeft+Borderpx)+"px"; 
	//document.getElementById("Javascript.RightDiv").style.display=""; 
	//document.getElementById("Javascript.RightDiv").style.top=(document.documentElement.scrollTop+Toppx)+"px"; 
	//document.getElementById("Javascript.RightDiv").style.left=(document.documentElement.scrollLeft+document.documentElement.clientWidth-document.getElementById("Javascript.RightDiv").offsetWidth-Borderpx)+"px"; 
} 

function hidead() 
{ 
	showad = false; 
	document.getElementById("Javascript.LeftDiv").style.display="none"; 
	//document.getElementById("Javascript.RightDiv").style.display="none"; 
} 

window.onscroll=scall; 
window.onresize=scall; 
window.onload=scall;