三眼哮天录蓝缡x悟空:高手来看看这段JAVASCRIPT代码有没有问题！

<SCRIPT language=javascript>
suspendcode="<DIV id=backi style='right:5px;POSITION:absolute;TOP:0px;'><img border=0 src='images/fd.gif'></div>"
document.write(suspendcode);
lastScrollY=0;
function heartBeat(){
diffY=document.body.scrollTop;
percent=.1*(diffY-lastScrollY);
if(percent>0)percent=Math.ceil(percent);
else percent=Math.floor(percent);
document.all.backi.style.pixelTop+=percent;
lastScrollY=lastScrollY+percent;
}
window.setInterval("heartBeat()",1);

</SCRIPT>
<SCRIPT language=javascript>
suspendcode1="<DIV id=left style='left:0px;POSITION:absolute;TOP:0px;'><a href='http://www.3klp.com/' target='_blank'><img border=0 src='images/fd.gif'></a></div>"
document.write(suspendcode1);
lastScrollY1=0;
function heartBeat1(){
diffY1=document.body.scrollTop;
percent1=.1*(diffY1-lastScrollY1);
if(percent1>0)percent1=Math.ceil(percent1);
else percent1=Math.floor(percent1);
document.all.left.style.pixelTop+=percent1;
lastScrollY1=lastScrollY1+percent1;
}
window.setInterval("heartBeat1()",1);
</SCRIPT>

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就是让图片随着页面飘动的代码