Introduction To Xajax

This article is interesting: http://www.phpro.org/tutorials/Introduction-To-Xajax.html

The Xajax library provides a useful and simple method of generating asynchronous requests with next to not knowledge of JavaScript. All the JavaScript code is generated internally and leaves the developer to simply implement PHP functions.
This tutorials is an absolute basic beginners guide to getting started with xajax. Full source code is provided with an explanation of how the process works.