ajax控件

body>
    <form id="form1" runat="server">
        <asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>
    <div>
        <div class="asdf">
            <asp:UpdatePanel ID="UpdatePanel1" runat="server">
            <ContentTemplate>
                <asp:LinkButton ID="LinkButton1" runat="server">登陆 </asp:LinkButton>
                <asp:Panel ID="Panel1" runat="server" Height="50px" Width="125px">
                    <asp:Label ID="Label1" runat="server" Text="Label"> </asp:Label>
                          </asp:Panel>
                <cc1:ModalPopupExtender ID="ModalPopupExtender1" runat="server" TargetControlID="LinkButton1" PopupControlID="Panel1" DropShadow="true" Drag="true"&