[BINNY]

HI,



The term Ajax, which stands for “Asynchronous JavaScript and XML”, was first coined by Jesse James Garrett in his somewhat infamous article, » Ajax: A New Approach to Web Applications.



So let’s take each of those parts in isolation.


Ajax is:

Asynchronous

This means that when you send a
request, you wait for the response to come back, but are free to do
other things while you wait. The response probably won’t come back
immediately, so you set up a function that will wait for it to be sent by the server, and react to it once that happens.

JavaScript

JavaScript
is used to make a request to the server. Once the response is returned
by the server, you will generally use some more JavaScript to modify
the current page’s document object model in some way to show the user that the submission went through successfully.

XML

The
data that you receive back from the server will often be packaged up as
a snippet of XML, so that it can be easily processed with JavaScript.
This data can be anything you want, and as long as you want.

There’s nothing really new about what is happening here. We’re
requesting a file (which will often be a server-side script, coded in
something like PHP), and receiving a page as the response. This is how
the web works already — the only difference is that now we can make
these requests from JavaScript.

Edited by: BINNY