AJAX is not a new programming language, but a technique for creating better, faster, and more interactive web applications.
AJAX uses asynchronous data transfer (HTTP requests) between the browser and the web server, allowing web pages to request small bits of information from the server instead of whole pages.
The AJAX technique makes Internet applications smaller, faster and more user-friendly.
* AJAX is a browser technology independent of web server software.
So you dont have to worry about the Server Side Technology when implementing AJAX in your Web Applications