document.write("<scri"+"pt type='text/javascript' src='http://js.doyoo.net/j.jsp?c=20529&f=41989'></scr"+"ipt>"); 
var lastScrollY=0;     
function heartBeat(){    
var diffY;     
if (document.documentElement && document.documentElement.scrollTop)     
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else if (document.body)     
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else     
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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);}}    
zcode="<div id='adleft' style='left:3px;position: absolute;z-index:1;top:120px;'><iframe scrolling='no' width='95' height='350' src='http://www.openlab.cn/ad/left.htm' frameborder='0'></iframe></div>"; 
ycode="<div id='adright' style='right:1px;position: absolute;y-index:1;top:280px;'><iframe scrolling='no' width='108' height='170' src='http://www.openlab.cn/ad/images/right_pf.jpg' frameborder='0'></iframe></div>";   

document.write(zcode); 
document.write(ycode);   
  
screencl('adleft');  
screencl('adright');   

window.setInterval("heartBeat()",1);