var lastScrollY=0;    
function heartBeat(){   
var diffY;    
if (document.documentElement && document.documentElement.scrollTop)    
diffY = document.documentElement.scrollTop;    
else if (document.body)    
diffY = document.body.scrollTop    
else    
{/*Netscape stuff*/}    

percent=.1*(diffY-lastScrollY);     
if(percent>0)percent=Math.ceil(percent);     
else percent=Math.floor(percent);     
document.getElementById("adleft").style.top=parseInt(document.getElementById("adleft").style.top)+percent+"px";    
document.getElementById("adright").style.top=parseInt(document.getElementById("adright").style.top)+percent+"px";    
lastScrollY=lastScrollY+percent;     
}    

function adhide(names){document.getElementById(names).style.display='none';}   
function screencl(names){if(screen.width<=800){adhide(names);}}   
ycode="<div id='adleft' style='left:10px;position: absolute;z-index:1;top:100px;'><div style='width:150px;height:240px;background:none;'><img src='http://static.qhdxw.com/public/ads/lt_w150.jpg' width='150' height='240'/></div><div align='right' style='background:#fff;font-size:0px;'><img src='http://static.qhdxw.com/public/ads/close.gif' title='关闭' onclick=adhide('adleft') style='cursor:pointer'/></div></div>";
zcode="<div id='adright' style='right:10px;position: absolute;z-index:1;top:100px;'><div style='width:120px;height:93px;'><a href='http://special.qhdxw.com/2011nyf/' target='_blank'><img src='http://static.qhdxw.com/public/ads/nyf_120x93.jpg' width='120' height='93'/></a></div><div align='left' style='background:#fff;font-size:0px;'><img src='http://static.qhdxw.com/public/ads/close.gif' title='关闭' onclick=adhide('adright') style='cursor:pointer'/></div></div>";
document.write(zcode);   
document.write(ycode);   
screencl('adleft');   
screencl('adright');   
window.setInterval("heartBeat()",1);