I'a writing first time so sorry if i reapeat but i wanted to say this in my own words and angle. My question is : Lets assume that we'r going throught php/html files a-----> b ------> c |<--------| 1)From a to b through a link 2)from b to c through a submit button (post method) 3) c is a php script which does some mysql queries and changes some session variables and outputs a location header to return to b. While back in b we press the back button when back button is pressed my icewiesel browser gets me to 'a' page. Trying to find some sense i postulated that a browser holds in its history (for back/forward) only requests made explicitly by the user and not the ones made from withing php files (with header commands) . Is my theory right.. I'm searching in the broader context of trying to control how my bookstore website will react to random events from the user (back/forward, links etc) while in a middle of a series of php files that i want to act as a transaction. Any help- recommendations for study on the subject would be very welcomed. I have 3 books on mysql/php but that issues r not examined, Prekates Alexandros Trikala Greece -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php