Hi Jim,
It would probably be easier to add the functionality directly to form builder --if it is possible. I know others have made attempts at adding features, but I don't think the complete form spec is available yet.
Quiet frankly, I've never been able to implement dynamic form builder apps.. it's too many layers of abstraction for my pea-sized brain with its limited attention span.
The qf_ api allows me to convert simple html into a dynamic tcl framework, which provides as much complexity as is needed without the extra abstractions, and without being limited by the form builder api.
cheers,
