I have seen this question asked many times in forums, but I either don't understand the solution, or I try the solution, and it doesn't work. Here goes:

I have a cookie login script, but whenever I expire the session cookie, the user can still hit the back button, and see the last page. I want to be able to clear the cache, or use some other method to disable the back button. I don't want to use javascript, because that can be disabled by the user. I especially want to use this when a user deletes their account.

I currenty have a logout perl script that redirects to a web page after the cookie is expired.

The latest thing I saw in a forum and tried, is to put the following in all the pages to expire the cache, but it doesn't work:

<meta http-equiv="pragma" content="no-cache" /> 
<meta http-equiv="expires" content="0" />
I know there has to be a way to do this right, because it's used with secure servers all the time. After you log out, if you hit the back button, it shows "session expired".

Does anyone know how the pro's are doing this? Thanks!

Also, could someone tell me how you can get this forum to instant email you everytime someone replies? It usually only does it once for me. I use the instant email setting when I submit a thread.