What is AJAX

AJAX offers users a seamless way to work with your interface, no waiting for whole pages to load.  

jQuery has a set of tools to make it super simple to implement. 

We will walk you through how to use jQuery to connect to PHP so you can step up your user interface.

What is AJAX

plainly means that instead of waiting for the whole page to load, you can load only what you need to. 

 So if you only need to update one small text part of your site, 

you don't have to worry about loading everything else on that page

Working Example : http://www.devirtuoso.com/2009/07/beginners-guide-to-using-ajax-with-jquery/