Ajax for beginners

http://www.youtube.com/watch?v=dtrWHL9Asec&feature=related

http://www.phpjavascript.com/script.php?scriptid=107

PDF FILES

foundations-of-ajax-2006

ajax-patterns-and-best-practices-2006

ajax-in-action-2006

ajax-for-dummies-2006

ajax-and-php-building-responsive-web-applications-2006