Jquery几行代码解决跟随屏幕滚动DIV

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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>jquery.text-effects</title>
    <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
    <style>
        #test
        {
            position: absolute;
            top: 10px;
            right: 10px;
            width: 130px;
            height: 60px;
            background: #555;
            color: #fff;
            font-size: 13px;
        }
    </style>
    <script src="http://img.jb51.net/jslib/jquery/jquery-1.3.2.min.js" type="text/javascript"></script>
    <script language="javascript">
        $(document).ready(function () {
            var menuYloc = $("#test").offset().top;
            $(window).scroll(function () {
                var offsetTop = menuYloc + $(window).scrollTop() + "px";
                $("#test").animate({ top: offsetTop }, { duration: 600, queue: false });
            });
        });
    </script>
</head>
<body>
    <h1>7行代码的跟随屏幕滚动层.</h1>
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    <div id="test">Dev By CssRain.cn<br/>Test ie6+,firefox3.0</div>
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</body>
</html>