where are good on-line sites to learn ajax style programing?

Answer 1

The worlwide web consortium has trutorials for all the various markup and programming languages you'd ever need. They're the ones responsible for web standards worldwide, so they know thgeir stuff. Check the AJAX link below, and don't forget to bookmark the page, as well as checking out their other tutorials.

I hope this helps you with what you're working on..

Answer 2

I hope, it will be enough for the first time :-)
http://ajaxian.com/archives/ajax-tutorial-round-up
http://developer.mozilla.org/en/docs/AJAX:Getting_Started
http://www.xml.com/pub/a/2005/02/09/xml-http-request.html