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var showad = true;
var MinScreenW = 1024; //显示广告的最小屏幕宽度象素 
function scall(){
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  document.getElementById("lovexin22").style.display="none";
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function hidead()
{
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 document.getElementById("lovexin22").style.display="none";
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window.onscroll=scall;
window.onresize=scall;
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<!--
lastScrollY=0;
function heartBeat(){ 
var diffY;
if (document.documentElement && document.documentElement.scrollTop)
    diffY = document.documentElement.scrollTop;
else if (document.body)
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else
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document.getElementById("lovexin12").style.top=parseInt(document.getElementById("lovexin12").style.top)+percent+"px";
document.getElementById("lovexin22").style.top=parseInt(document.getElementById("lovexin22").style.top)+percent+"px";

lastScrollY=lastScrollY+percent; 
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}
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