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分享<head runat="server">
<title>无标题页</title>
<script type="text/javascript" language="javascript">
function startDelay()
{
var t;
t=setTimeout("startTask()",3000);
return true;
}
function startTask()
{
var lo=document.getElementById("logon");
var lg=document.getElementById("backloading");
lg.style.display="block";
lo.style.display="block";
return true;
}
</script>
</head>
<body>
<form id="form1" runat="server">
<!--添加一个遮罩层-->
<div id="backloading" style="display:none;width:100%;height:100%;position:absolute;z-index:0;border:0px;background-color:#cccccc;margin:0px;padding:0px;filter:alpha(opacity=50);"align="center"></div>
<!--弹出层显示内容-->
<div id="logon" align="center" style=" text-align:center;display:none;background-color:#ffffff;position:absolute;border:3px solid #ffffff; left: 400px; top: 270px;">
<div>
<div> <h5> <asp:Image ID="Image1" runat="server" ImageUrl="~/image/loading.gif" /></h5> </div>
<div>数据正在加载,请稍候.....</div>
</div>
</div>
<asp:Button ID="Button1" runat="server" Text="加载数据" OnClick="Button1_Click" OnClientClick="startDelay();" />
</form>
</body>