[Zope] Help with String conversion in Zope

Dear all, I have a problem checking if an input from a form is a string or not and then change it into a float. The Zope code I have written is as follows but it does not work. <dtml-if expr="same_type(standardkit_cost, 'Test')"> <dtml-call "REQUEST.set ('standardkit_cost', _.float(standardkit_cost))"> </dtml-if> Thanks, Enrica _________________________________________________________________ Stay in touch with absent friends - get MSN Messenger http://www.msn.co.uk/messenger