Hello, I have constructed the following code and I cannot get the login control to pop up on the webpage, before allowing access to the webpage.
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:ModalPopupExtender ID="ModalPopupExtender1" runat="server"
TargetControlID="btnlogin"
PopupControlID="popUpPanel"
CancelControlID="btnclose"
DropShadow="true">
</asp:ModalPopupExtender>
<asp:Panel ID="popUpPanel" runat="server">
<table>
<tr>
<td>Username:<span class="redstar">*</span></td>
<td><asp:TextBox ID="txtUserName" runat="server" placeholder=" UserName" Width="186px"></asp:TextBox>
<asp:RequiredFieldValidator ID ...
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