[Zope] Very lightweight form validation

[Jens Vagelpohl]

> I've looked at some of the various form-processing add-ons but all of 
> them
> see very "heavy" when what I mainly want to do is ensure that the user
> remembered to fill in their last name, and if not, tell them that they 
> need
> to enter it and try again.  Seriously, that's about the sophistication
> level I'm targeting.

I'd use simple JavaScript that gets invoked when your form is submitted.

jens