logout in php4.2
I m using php4.2 and my authentication(login) success in my project. I do my work properly but as I click on logout button, there exists my desired new login(authentication) page. But as I click back button situated on the left top most corner on the browser, it again shows my earlier login page. How can I overcome by this problem. I had just used header("Location: login.php"); for button logout.
Please reply me....