lastScrollY=0;
function heartBeat()
{
    if(document.body==null)return;
    diffY=document.body.scrollTop+document.documentElement.scrollTop;
    percent=.1*(diffY-lastScrollY);
    if(percent>0)
    {
        percent=Math.ceil(percent)
    } 
    else 
    { 
        percent=Math.floor(percent)
    } 
    if(document.getElementById("lovexin1")!=null)document.getElementById("lovexin1").style.top=(parseInt(document.getElementById("lovexin1").style.top,10)+percent)+"px"
    if(document.getElementById("lovexin2")!=null)document.getElementById("lovexin2").style.top=(parseInt(document.getElementById("lovexin2").style.top,10)+percent)+"px"
     lastScrollY=lastScrollY+percent
}

function hide()  
{
    document.getElementById("lovexin1").style.visibility="hidden"; 
    document.getElementById("lovexin2").style.visibility="hidden";
}

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