lastScrollY=0;
function heartBeat(){ 
var diffY,screenwidth;
if (document.documentElement && document.documentElement.scrollTop)
{
 diffY = document.documentElement.scrollTop;
 screenwidth = document.documentElement.offsetWidth;
}
else if (document.body)
{
 diffY = document.body.scrollTop;
 screenwidth = document.body.offsetWidth;
}
else
    {/*Netscape stuff*/}
 
//alert(diffY);
percent=.1*(diffY-lastScrollY); 
if(percent>0)percent=Math.ceil(percent); 
else percent=Math.floor(percent); 
document.getElementById("leftad").style.top=parseInt(document.getElementById("leftad").style.top)+percent+"px";

document.getElementById("rightad").style.top=parseInt(document.getElementById("leftad").style.top)+percent+"px";

if(screenwidth>=960){
document.getElementById("leftad").style.left="0px";
document.getElementById("rightad").style.right="0px";	
}else if(screenwidth>=870){
document.getElementById("leftad").style.left="-30px";
document.getElementById("rightad").style.right="-30px";

}else if(screenwidth>=830){
document.getElementById("leftad").style.left="-60px";
document.getElementById("rightad").style.right="-60px";
}
else{
document.getElementById("leftad").style.left="-90px";
document.getElementById("rightad").style.right="-90px";	
	
	}

lastScrollY=lastScrollY+percent; 

setTimeout("heartBeat();",80)

//alert(lastScrollY);
}
suspendcode12="<DIV id=\"leftad\" style='width:90px;height:400px;POSITION:absolute;TOP:30px;'><a href='#' target='_blank'><img src='/ad/duilian.gif' border='0' width='90' height='250' alt='广告位招租 0335-8860929'></a><br /><br /><br /><a href='http://www.sdrxmuye.com' target='_blank'><img src='/ad/rx2010.03.13.gif' border='0' width='90' height='250' alt='瑞翔牧业'></a></div>"
suspendcode14="<DIV id=\"rightad\" style='width:90px;height:400px;POSITION:absolute;TOP:30px;'><a href='#' target='_blank'><img src='/ad/duilian.gif' border='0' width='90' height='250' alt='广告位招租 0335-8860929'></a><br /><br /><br /><a href='http://www.sdrxmuye.com' target='_blank'><img src='/ad/rx2010.03.13.gif' border='0' width='90' height='250' alt='瑞翔牧业'></a></div>"
document.write(suspendcode12); 
document.write(suspendcode14); 
heartBeat();