jQuery滚动层，仿QQ在线客服

答案：<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>jQuery滚动层，仿QQ在线客服</title>
<style type="text/css">
<!--
#qqonline {
	background-color:Yellow;
	border: 1px solid #fcc;
	position:absolute;
	top:250px;
	left:18px;
	width:200px;
	height:120px;
}
-->
</style>
<script type="text/javascript" src="http://www.zzzyk.com/ajaxjs/jquery1.3.2.js"></script>
<script type="text/javascript">
$().ready(function(){
	$(window).scroll(function() {
		window.setTimeout(function(){
		var bodyTop = 0;   
		if (typeof window.pageYOffset != 'undefined') {   
			bodyTop = window.pageYOffset;   
		} else if (typeof document.compatMode != 'undefined' && document.compatMode != 'BackCompat') {   
			bodyTop = document.documentElement.scrollTop;   
		}   
		else if (typeof document.body != 'undefined') {   
			bodyTop = document.body.scrollTop;   
		}   
	
		$("#qqonline").css("top", 100 + bodyTop)
		$("#qqonline").text(bodyTop);
		},300)
	})
});  
</script>
</head>
<body style="height:1800px">
    <div id="qqonline">  
        QQ在线服务   
    </div>  
</body>  
</html>

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