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http://www.cnblogs.com/baihmpgy/p/3305215.html

<!doctype html>
<html>
 <head>
  <meta charset="UTF-8">
  <title>Document</title>
  <style type="text/css">
    #toTop{
        width:100px;
        border:1px solid #ccc;
        background:#f7f7f7;
        text-align:center;
        padding:5px;
        position:fixed;
        bottom:10px;
        right:10px;
        cursor:pointer;
        display:none;
        color:#333;
        font-size:11px;
    }
  </style>
 </head>
 <body>
  <div style="height:2000px;">http://www.iopenworks.com/Documents/DocumentsList</div>
  <script src="js/jquery.min.js" type="text/javascript"></script>
  <script type="text/javascript">
        $(document).ready(function () {
            $('#Documents').addClass("currentPage");
            $(window).scroll(function () {
                if ($(this).scrollTop() > 200) {
                    $('#toTop').fadeIn();
                } else {
                    $('#toTop').fadeOut();
                }
            });

            $('#toTop').click(function () {
                $('body,html').animate({ scrollTop: 0 }, 800);
            });
        });    
  </script>

  <div id="toTop">^ Top</div>
 </body>
</html>

posted on 2015-10-06 14:45 z5337 阅读(616) 评论(0) 编辑收藏举报

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