infomation already sent

right. i have your standard add data to a DB script working. but the problem is that my users are getting "information already submited"(or whatever, i got IE in french :p) asking if the user wants to resubmit the form. how do i stop users from getting this? i know its possible. if you look on www.deviantart.com, theyhave this in effect everywhere on their site. ay ideas?

Dead link.

the problem is that my users are getting "information already submited"(or whatever, i got IE in french ) asking if the user wants to resubmit the form. how do i stop users from getting this?
Is this a message that you echo? Or is it the blank warning page with the 'page has expired' ??

oops that would be

www.deviantart.com

and its the IE generated page about page expiry(the latter you mentioned)

Im not sure at all what i should be looking at at that site.


About the expiration-page: you'll normaly only get that if you jump back in the history (back button or alt +<-- or javascript). So if you jump back to a posted page.
Since it's a browser-issue, there is not much you can do, i fear. Unless avoiding javascript redirects yourself, so not using hoistory.back links etc.