silly question

Hi list, I have PHP code to insert the result of a form into mysql. When I nedd to made an update, I pass an "id" in the url and use it to make the update query. The problem is after I click in the update button (input submit) my page refresh and came back in the same state, to see the changes I need to type in the url again with the parameter?? why?? There's a way to avoid this and get a new blank form page after the update? ps: I've stored the "id" in a input type hidden, so I could click the button and still have the id Thank's in advance Rodrigo Peres --