分享在线客服浮动效果。代码如下：
<!doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>在线客服浮动</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="/demo/js/jq.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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