[Zope] :int question

Hello, Here is Hungary :) My question: I have a form, something like this: <form> <input type="text" name="name:int"> <input type="submit"> </form> And, when somebody write somethimg, what is not an integer he get a zope error message. How I can handle easily this problem? If you have a link to some example, it would be very good. Thanks, -- Amon Tamas sajt@amon.hu