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("lad").style.top=parseInt(document.getElementById("lad").style.top)+percent+"px";
//document.getElementById("rightad").style.top=parseInt(document.getElementById("rightad").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="";
//ycode="";
document.write(zcode);
//document.write(ycode);
screencl('lad');
//screencl('rightad');
window.setInterval("heartBeat()",1);