[Zope] Trimming a text field in a form

Hey all, Another question. How do you trim a form field with dtml? I have JavaScript doing it when the form is submitted, but that doesn't help much for those browsers whose user's have disabled JavaScript. In ColdFusion, or even the dreaded ASP, I had a Trim() function at my disposal. Is there something that I can do with dtml - possibly a python expression that I use in a <dtml-call expr=""> type thingy? Thanks in advance, Tommy Innovation: The Best Way To Predict The Future ... Is To Create It.