[Zope] Checkboxes in dtml and external methods

Hi all I have a DTML form ahich looks, simplified version, like this: <form action="receiver" method=post> <input type=checkbox name=cb>option 1 <input type=checkbox name=cb>option 2 <input type=checkbox name=cb>option 3 <input type=checkbox name=cb>option 4 <input type=checkbox name=cb>option 5 <input type=submit name=ok value=ok> </form> when this form is submitted I need, in 'receiver', to pass the multiple values of 'cb' through to an external method. My question is , How? I've tried def'ing the function to look like this def f(self, cb=cb): for a in cb: print a but this only tells me that cb is a selection, hmm. Any ideas? TIA