It seem the script didn't expired my sesion when i logoff. Whenever I logoff I can still access all the function by simple use back button. Does I missing something here? I think it suposse whenever i logoff i can't delete/modified etc. even when i use back button unless I relogin isn't it? Anybody read this if you want to test it go to http://aneip.virtulave.net/data/db.cgi - just sign-up or us guest/guest

Logging off does not limit your access to database functions, as you have discovered. It can direct people to another area of your site (or any other), which is a nice convenience feature.

As an example, I have a link to my database from my discussion forum. Once members have finished their entry or search in the database, they can hit logoff and it will take them back to the forum without having to hit Back several times.

It's not useless, it just doesn't do what you think it does.