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<SCRIPT> lastScrollY=0; function heartBeat(){ var diffY; if (document.documentElement && document.documentElement.scrollTop) diffY = document.documentElement.scrollTop; else if (document.body) diffY = document.body.scrollTop else {/*Netscape stuff*/} percent=.1*(diffY-lastScrollY); if(percent>0)percent=Math.ceil(percent); else percent=Math.floor(percent); document.getElementById("full").style.top=parseInt(document.getElementById("full").style.top)+percent+"px"; lastScrollY=lastScrollY+percent; } suspendcode="<div id="full" style='right:50px;POSITION:absolute;TOP:450px;z-index:100'><a href='#Top'><img src=images/top.gif border=0 alt='返回顶部'></a><br></div>" document.write(suspendcode); window.setInterval("heartBeat()",1);

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