1.
<script language="javascript" type="text/javascript">
document.write("<div id='loadDiv' style='padding-top: 250px; padding-left: 350px;font-size:x-large;height:400px'><span id='loading'><img src=\"../Images/loader2.gif\"/>正在加载数据，请稍候···</span></div>");
window.onload = function()
{
document.getElementById("hiddenDiv").style.display="";
document.getElementById("loadDiv").parentNode.removeChild(document.getElementById("loadDiv"));
}
</script>
2. <form id="form1" runat="server"><div id="hiddenDiv" style="display: none; "></div></form>
3.
<script type="text/javascript" language="javascript">
document.getElementById("hiddenDiv").style.display="";
document.getElementById("loadDiv").parentNode.removeChild(document.getElementById("loadDiv"));
</script>
