AJAX vs DHTML
AJAX is gaining a lot of adopters these days and it seems to be like the new cool kid in town. If you’re in the web development area, you must use AJAX, otherwise you’re not cool at all.
But more than this, AJAX became a buzzword. And I definitely don’t like buzzwords. Because amateurs would try to use that word for everything that is related to that area.
I know that it is cool to use all these new buzzwords, but it will be much more correct to use the right term.
For a good AJAX reference you can use Wikipedia. Read also the articles referenced at the end, I would especially recommend the ones from IBM developerWorks.