等待加载提示

 <script type="text/javascript">
        $(window).load(function () { $("#loading").hide(); })
      </script>

 <style>
        #loading
        {
            position: absolute;
             300px;
            top: 0px;
            left: 50%;
            margin-left: -150px;
            text-align: center;
            padding: 7px 0 0 0;
            font: bold 11px Arial, Helvetica, sans-serif;
            margin-top:1933px;
            z-index:1000;
        }
    </style>

 <%--放在顶部     --%>

<div id="loading">
        Loading content, please wait..<img src="images/loading.gif" alt="loading.." /></div>