inputbox?

is there a way to for an input box to come up looking for a value? I know there are a few ways I could resolve my current issue, but I would prefer to display an inputbox, and use that value in my query. basically I would do a $HTTP_SERVER_VARS['PHP_SELF'] as the action of a form, but then I would have to get a value to pass to the query. this would be for prepaid phone cards. if somebody selected to recharge then I would like an input box to be displayed asking the amount they would like to recharge. -- Jeff Bluemel