js回到頂部

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<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
??? <title></title>
??? <style type="text/css">
??????? #control_pannel
??????? {
??????????? background: #FFF none repeat scroll 0 0;
??????????? border: 2px solid #EFEFEF;
??????????? bottom: 2px;
??????????? padding: 1px;
??????????? position: fixed;
??????????? _position: absolute;
??????????? right: 272px;
??????????? width: 80px;
??????????? font-size: 12px;
??????? }
??????? #control_pannel a
??????? {
??????????? display: block;
??????????? color: #555;
??????????? padding: 2px 4px 2px 4px;
??????????? text-align: center;
??????????? filter: alpha(Opacity=20);
??????????? text-decoration: none;
??????? }
??????? #control_pannel a:hover
??????? {
??????????? background: #AAA;
??????????? color: #FFF;
??????????? text-decoration: none;
??????????? filter: alpha(Opacity=100);
??????? }
??? </style>

??? <script src="jquery/jquery-1.3.js" type="text/javascript"></script>
??? <script type="text/javascript">

??????? $(function() {

??????????? $(window).scroll(
??????????? function(event) {
??????????????? if ($(this).scrollTop() > 0) {
??????????????????? if ($.browser.ie6) {
??????????????????????? $('#goTopButton').css('top', $(this).scrollTop() + $(this).height() - 170);
??????????????????? }
??????????????????? if ($('#goTopButton').css('display') == 'none') {
??????????????????????? $('#goTopButton').fadeIn();
??????????????????? }
??????????????? }
??????????????? else {
??????????????????? $('#goTopButton').fadeOut();
??????????????? }
??????????? });

??????? });
????????????
?????
??? </script>

</head>
<body>
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??????? <div id="control_pannel">
??????????? <a href="javascript:void(0);" οnclick="window.scrollTo(0,0);" id="goTopButton" style="display: none;">
??????????????? 回到頂部</a>
??????? </div>
??? </form>
</body>
</html>

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