var showad = true; 
var Toppx = 40; //上端位置 
var AdDivW = 84; //宽度 
var AdDivH = 300; //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 ClosebuttonHtml = '<div align="right" style="position: absolute;top:0px;right:0px;margin:2px;padding:2px;z-index:2000;"><img src=images/close.gif width=12 height=12 border=0></a></div>' 
var AdContentHtml = '<div align="center" target=_blank><img src=images/ggao.gif></div>'; 

document.write ('<div id="Javascript.LeftDiv" style="position: absolute;border: 1px solid #336699;background-color:#EEEEE2;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: 1px solid #336699;background-color:#EEEEE2;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.body.scrollTop+Toppx; 
document.getElementById("Javascript.LeftDiv").style.left=document.body.scrollLeft+Borderpx; 
document.getElementById("Javascript.RightDiv").style.display=""; 
document.getElementById("Javascript.RightDiv").style.top=document.body.scrollTop+Toppx; 
document.getElementById("Javascript.RightDiv").style.left=document.body.scrollLeft+document.body.clientWidth-document.getElementById("Javascript.RightDiv").offsetWidth-Borderpx; 
} 

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;