[Zope] string or list?

Greetings, I'm having a small problem (duh! :) In my page, a person might select a number of items from a list. The list is generated from an SQL query, and has unique IDs for each row. Fine. Simple, right? Sure... And each row has a radiobutton input called 'done'. When the user hits submit, if they've pressed any of the radiobuttons i will get either a 'done' string (one selected) or a 'done' list (multiple selected). Problem is.. how do i tell which? Is it possible with DTML, as i try to avoid using external methods for something so trivial. -- Have a better one, Curtis. <dtml-var standard_work_disclaimer>