HTTP AUTHENTICATION and LOGOUT Problem

I've wrote an application using mod_auth_ldap for authentication with apache. I need to put a Logout button to exit from the application and return to a non-protected index file. I've done something like that: <? if ($REMOTE_USER==$user) { Header( "WWW-authenticate: basic realm=\"S.C.T.R. - Utente\""); Header("HTTP/1.0 401 Unauthorized"); ?><script language="javascript">document.location='../'; </scrip t><? exit; } ?> <script language="javascript">document.location='index.php3p'; </script> If the user press the logout button, I redirect it to the above file. The file forces the user to login with another account or press cancel to authentication. If it login with another account it will be redirected to the application, if it press cancel it is redirected to a non-protected index page. It works good with Netscape, but have some trouble with Explorer since this last doesn't present a Authentication failed box, but present the login box. Is there another way to do this ? Another problem is that I can't read the PHP_AUTH_USER, bu I have to read REMOTE_USER. Thanks -- E.Mauriello <inmaer@inteltec.it> Network Engineer In.Tel.Tec. SpA Networked Applications Division Salita Scudillo, 20 80131 Napoli (Italia) Tel.+39081-5921418 Fax +39081-5922026