force page exit with submit button

Dear group, i'm planning to change a javascript shoppingcart site to a PHP site. For the javascritp shoppingcart it was convenient to have an index so i made it with frames, menu on the left, content on the right, data automatically updated to the index as soon as some field was unfocused. I would like to keep the frame structure. Now I'm afraid users will fill in one page, and not push the submit button but use the menu to change to another order page, so the orders of the first order page are lost. Are there other ways than a combination of unload and javascript? groetjes, Chris -------------------------------------------------------------------- -- C.Hayes Droevendaal 35 6708 PB Wageningen the Netherlands -- --------------------------------------------------------------------