hide page browsing in browser address bar

["Alain Roger" <raf.news@xxxxxxxxx>]

Hi,

usually when a user browser a web site, the browser address bar display the full link of the browsed page something like :
http://www.myweb.com/hellopage.php
or http://www.myweb.com/catalog/fun/mypage.php

how can i do to only and ALWAYS display http://www.myweb.com/ in the browser address bar ?
especially when i do not control the apache server configuration (because it is hosted somewhere else).

could i use the .htaccess file to do that ?
if yes, how ?

thanks a lot,

-- 
Alain
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Windows XP SP2
PostgreSQL 8.2.4 / MS SQL server 2005
Apache 2.2.4
PHP 5.2.4
C# 2005-2008