如果页面太长,通过此方法可能做个连接的东西实现.
<style type="text/css">
<!--
#floater {position:absolute; visibility:visible}
-->
</style>
<script language="JavaScript">
<!--
self.onError=null;
currentX = currentY = 0;
whichIt = null;
lastScrollX = 0; lastScrollY = 0;
NS = (document.layers) ? 1 : 0;
IE = (document.all) ? 1: 0;
<!-- STALKER CODE -->
function heartBeat() {
if(IE) {
diffY = document.body.scrollTop;
diffX = 0;
}
if(NS) { diffY = self.pageYOffset; diffX = self.pageXOffset; }
if(diffY != lastScrollY) {
percent = .1 * (diffY - lastScrollY);
if(percent > 0) percent = Math.ceil(percent);
else percent = Math.floor(percent);
if(IE) document.all.floater.style.pixelTop += percent;
if(NS) document.floater.top += percent;
lastScrollY = lastScrollY + percent;
}
if(diffX != lastScrollX) {
percent = .1 * (diffX - lastScrollX);
if(percent > 0) percent = Math.ceil(percent);
else percent = Math.floor(percent);
if(IE) document.all.floater.style.pixelLeft += percent;
if(NS) document.floater.top += percent;
lastScrollY = lastScrollY + percent;
}
}
if(NS || IE) action = window.setInterval("heartBeat()",1);
//-->
</script>
<!--top Start-->
<div id="floater" style="position:absolute; left:755px; top:320px; width:26px; height:24px; z-index:0">
<A onfocus=this.blur(); href="#top"><img src="/img/top.gif" border=0></a>
</div>
<!--top End-->
