Ajax please....

Hey, Just been googleing and trying out different AJAX frameworks..: From PEAR HTML_AJAX Gauva My-Bic AjaxAC and quite a few more....and it happened, I confused myself :-( For some reason HTML_AJAX is not working on my local machine (windows based, I am getting runtime errors with the examples) and it seems quite bulky. I have even tried the YAHOO one, which Rasmus suggested to another guy some time back (found it after looking in the archives) unfortunatly could not find much documentation that I could understand... Hopefully after reading about my requirment(s) someone can suggest something thats really simple (or really well documented with examples) Requirements: Write little or no JS When i submit the form, it should simply call my script and print out the answer inbetween the DIV tags This is what i want to use it for: Client comes to site, wants to make an account, I check if the username he entered is not already in use, if already in use I print out a failute message in red on the screen if not in use....i make his account and print out a success text or redirect him to a success page. THATS IT, nothing too fancy. Thanks in advance. Cheers, Ryan