Thanks Deva to provide the code:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default3.aspx.cs" Inherits="Default3" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled Page</title>
<style>
.yourDivCSS
{
background:white;
}
.Modalpopup
{
position:absolute;
z-index:-1;
left:-15px;
top:-15px;
color: Black;
border: 15px solid gray;
background-color: White;
opacity: 0.8;
filter: alpha(opacity=80);
}
.modalBackground
{
background-color: White;
opacity: 0.01; /* Safari, Opera */
-moz-opacity: 0.01; /* FireFox */
filter: alpha(opacity=1); /* IE */
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:LinkButton ID="LinkButton1" runat="server">LinkButton</asp:LinkButton>
<cc1:ModalPopupExtender ID="ModalPopupExtender1" TargetControlID="LinkButton1" PopupControlID="Panel1" runat="server"
BackgroundCssClass="modalBackground">
</cc1:ModalPopupExtender>
<asp:Panel ID="Panel1" runat="server">
<div class="yourDivCSS" style="width:200px; height:200px">
devanand dhage
<%--<asp:LinkButton ID="LinkButton10" runat="server">open panel popup</asp:LinkButton>--%>
</div>
<div class="Modalpopup" style="width:200px; height:200px">
</div>
</asp:Panel>
<%--<cc1:PopupControlExtender ID="PopupControlExtender1" TargetControlID="LinkButton10" PopupControlID="Panel2" runat="server"
Position="Right">
</cc1:PopupControlExtender>
<asp:Panel ID="Panel2" runat="server">
<div class="Modalpopup">
Hi this is my popup
</div>
</asp:Panel>--%>
<br />
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
</div>
</form>
</body>
</html>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled Page</title>
<style>
.yourDivCSS
{
background:white;
}
.Modalpopup
{
position:absolute;
z-index:-1;
left:-15px;
top:-15px;
color: Black;
border: 15px solid gray;
background-color: White;
opacity: 0.8;
filter: alpha(opacity=80);
}
.modalBackground
{
background-color: White;
opacity: 0.01; /* Safari, Opera */
-moz-opacity: 0.01; /* FireFox */
filter: alpha(opacity=1); /* IE */
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:LinkButton ID="LinkButton1" runat="server">LinkButton</asp:LinkButton>
<cc1:ModalPopupExtender ID="ModalPopupExtender1" TargetControlID="LinkButton1" PopupControlID="Panel1" runat="server"
BackgroundCssClass="modalBackground">
</cc1:ModalPopupExtender>
<asp:Panel ID="Panel1" runat="server">
<div class="yourDivCSS" style="width:200px; height:200px">
devanand dhage
<%--<asp:LinkButton ID="LinkButton10" runat="server">open panel popup</asp:LinkButton>--%>
</div>
<div class="Modalpopup" style="width:200px; height:200px">
</div>
</asp:Panel>
<%--<cc1:PopupControlExtender ID="PopupControlExtender1" TargetControlID="LinkButton10" PopupControlID="Panel2" runat="server"
Position="Right">
</cc1:PopupControlExtender>
<asp:Panel ID="Panel2" runat="server">
<div class="Modalpopup">
Hi this is my popup
</div>
</asp:Panel>--%>
<br />
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage devanand dhage
</div>
</form>
</body>
</html>