[Charlie Reiman]

Actually, this will work although it is wordy. <dtml-if somevar> is special and will evaluate to false if somevar is not defined.

Ah, I did not know that. Nice. Javascript is like that - undefined variables return "undefined" which (along with null, 0, and "") evaluates to false for logical tests, so using Javascript's short-circuit logical evaluation, you can do things like if (theVar && theVar.property){ // the variable and its property both exist }

This is very different from <dtml-if "somevar"> which will throw and exception if somevar is not defined.

Right.

Having said that, using has_key is a lot cleaner.

Cheers, Tom P