Len,
>"DHTML is an abbreviation for the term "Dynamic HTML". But DHTML is just a buzzword. DHTML does not exist. It is not a "thing" or a standard defined by the World Wide Web Consortium (W3C). It is not defined anywhere. It is just a fancy word."
Good point. However, those who work regularly with DHTML will tell you that it's very real indeed. :-)
I agree that DHTML is mostly a generic reference to the exposed object model (DOM) and how you interact with it. I disagree with the assertion that it is not defined anywhere.
It may not exist as a broadly-accepted standard, but there is plenty of documentation on it, including a multitude of books. You'll find an entire section in the MSDN Library on it.