lastScrollY2=0;
function heartBeat2(){ 
var diffY2;
if (document.documentElement && document.documentElement.scrollTop)
diffY2 = document.documentElement.scrollTop;
else if (document.body)
diffY2 = document.body.scrollTop
else
{/*Netscape stuff*/}
percent2=.1*(diffY2-lastScrollY2); 
if(percent2>0)percent2=Math.ceil(percent2); 
else percent2=Math.floor(percent2); 
document.getElementById("PC_Right").style.top=parseInt(document.getElementById("PC_Right").style.top)+percent2+"px";
lastScrollY2=lastScrollY2+percent2; }
floatHTML='<DIV id="PC_Right" style="right:5px;POSITION:absolute;TOP:225px;z-index:0"><a href=""><img src="images/爆炸.png" height="100" width="150" border="0"></a></div>'
document.write(floatHTML)
window.setInterval("heartBeat2()",1);