Here is code how to hide these query string values from other people viewing this page
Code:
<HTML>
<HEAD>
<TITLE>Query String</TITLE>
</HEAD>
<BODY bgColor=LightCyan>
<h1 align=center>Query String</h1>
<hr color="red">
<a href="querystring.asp?username=Arnold&email=ar@yahoo.com">Hello</a>
</BODY>
</HTML>
(querystring.asp)
<%@ Language=VBScript %>
<HTML>
<HEAD>
<META NAME="GENERATOR" Content="Microsoft Visual Studio 6.0">
</HEAD>
<BODY>
<%
Response.Write Request.QueryString("username")&"<br>"
Response.Write Request.QueryString ("email")
%>
</BODY>
</HTML>