preventing reposting

[samafua]

hi,
i am working on a students course registration site.
how can i prevent the form which contains the regstered courses from reposting it's information to the page that displays the registered courses when the page is refreshed?

[dinger]

If you are using a DB, check to see if there is already a record with the same information in the database before doing an INSERT. If the record exists, give an error message. If not, process the request as normal. This also eliminates duplicate entries due to other reasons.

Chris