页面右边的滑动按钮

<script type="text/javascript">
//右边的滑动按钮
//IE可用
var suspendcode = " <div id = backi style = 'right: 0px; POSITION: absolute; TOP: 200px;' > ";
suspendcode += "<a href = 'javascript: scroll(0, 0)'title = '顶部' > <font color = #CC0066 > ▲ </font></a > ";
suspendcode += "<a href = 'javascript: history.back()'title = '返回上次出处' > <font color = #CC0066 > ■ </font></a > ";
suspendcode += "<a href = 'javascript: scroll(0, 2000)'title = '底部' > <font color = #CC0066 > ▼ </font></a > </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>
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