Yes sir,
I have done the same but still does not work.
<%@ Page Language="C#" MasterPageFile="~/Home.master" AutoEventWireup="true" CodeFile="home.aspx.cs" Inherits="home" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
<script type="text/javascript">
function preventBack(){window.history.forward();}
setTimeout("preventBack()", 0);
window.onunload=function(){null};
</script>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
<table width="800px" border="0" cellspacing="1" cellpadding="1">
<tr>
<td>
<asp:Label ID="lblmessage" runat="server" Font-Bold="True" ForeColor="#FF3300"></asp:Label>
</td>
<td> </td>
</tr>
<tr>
<td> </td>
<td> </td>
</tr>
</table>
</asp:Content>
