var lastScrollX=0;
var lastScrollY=0;     
function heartBeat(){    

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

if (document.documentElement && document.documentElement.scrollTop)     
    diffY = document.documentElement.scrollTop;     
else if (document.body)     
    diffY = document.body.scrollTop     
else     
    {/*Netscape stuff*/}     
         
percent=.1*(diffX-lastScrollX);      
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";  
lastScrollX=lastScrollX+percent;

percent=.1*(diffY-lastScrollY);      
if(percent>0)percent=Math.ceil(percent);      
else percent=Math.floor(percent);        
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(window.screen.width<=800){adhide(names);}}    

xcode="<div id='adleft' style='left:20px;position: absolute;y-index:1;top:90px;'><iframe scrolling='no' width='76px' height='352px' src='/ad/adleft.htm' frameborder='0'></iframe></div>"; 
ycode="<div id='adright' style='right:10px;position: absolute;y-index:1;top:330px;'><img src='/ad/right_pf.jpg' border='0'></div>";   

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

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