First of all, AJAX is client side. Where it just sends data to the server and outputs it on your browser even without leaving the current page.
You may start learning by going to this link:
http://www.w3schools.com/ajax/default.asp
I have just recently learned AJAX from that site and they give the very important thing on how to use AJAX.
You may start learning by going to this link:
http://www.w3schools.com/ajax/default.asp
I have just recently learned AJAX from that site and they give the very important thing on how to use AJAX.