Hi

Is there a way of differentiating between a null return (user didn't bother to enter anything) and a "result not listed" (user tried to enter something but it's not in the list).

If I'm just checking the as_result both situations above would return the same value - for example, how would I use a checkform function to validate the form and progress if something has been entered or loop back if nothing has been entered?

I guess this ties in with my other question below re return the value of the entered item as well as the value.

Again thanks in advance

Chris