The html source is as below:
<%@ Page Language="C#" MasterPageFile="~/Home.master" AutoEventWireup="true" CodeFile="frmLogin.aspx.cs" Inherits="frmLogin" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server"></asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server"></asp:Content>
<asp:Content ID="Content3" ContentPlaceHolderID="cphsubmenu" runat="server">
<ul>
<li>
<asp:LinkButton ID="loginbtn" runat="server">Log in</asp:LinkButton>
</li>
</ul>
<cc1:ModalPopupExtender ID="ModalPopupExtender1" DropShadow="true" TargetControlID="loginbtn" PopupControlID="Panel1" runat="server">
</cc1:ModalPopupExtender>
<asp:Panel ID="Panel1" runat="server" Width="350px" CssClass="modalLogin">
<table border="0" cellspacing="1" cellpadding="1" width="350px">
<tr>
<td>
<asp:Label ID="lblusername" runat="server" ForeColor="#CC3300" Text="Username:"></asp:Label>
</td>
<td>
<asp:TextBox ID="txtusername" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server"
ControlToValidate="txtusername" Display="None"
ErrorMessage="Please enter username"></asp:RequiredFieldValidator>
<%-- <cc1:ValidatorCalloutExtender ID="RequiredFieldValidator1_ValidatorCalloutExtender"
runat="server" Enabled="True" TargetControlID="RequiredFieldValidator1" BehaviorID="textValidator">
</cc1:ValidatorCalloutExtender>--%>
</td>
</tr>
<tr>
<td>
<asp:Label ID="lblpassword" runat="server" ForeColor="#CC3300" Text="Password:"></asp:Label>
</td>
<td>
<asp:TextBox ID="txtpwd" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server"
ControlToValidate="txtpwd" Display="None" ErrorMessage="Please enter password"></asp:RequiredFieldValidator>
</td>
</tr>
<tr align="center">
<td colspan="2">
<asp:Button ID="btnlogin" runat="server" Text="Login"
onclick="btnlogin_Click" />
<asp:Button ID="btncancel" runat="server" Text="Cancel"
onclick="btncancel_Click" />
</td>
</tr>
<tr>
<td colspan="2" align="center">
<asp:Label ID="lblmsg" runat="server" ForeColor="#CC3300"></asp:Label>
</td>
</tr>
</table>
</asp:Panel>
</asp:Content>
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At cancel button the whole panel1(containing the login control created) should hide. How do i do it plzz help