This is sth which can be used for maintaining the data
silently. Like without refreshing the whole page you can
manage a part of page. 
This is very useful as it is supported by almost all of the
browsers.

This is used for maintaining the data
silently. by without refreshing the whole web page we can
manage a part of that current page page.

The main importance of the Ajax is no 1. need not reload the
entire page,
2.asynchronous comunication between browser and server


Deepakdivvela

Ajax is a component.where we put out controls in that.
There is one update component is provided by .NET,
This will not reload the page again.B'use of Javascript used at backend,
Its also maintain information just like view.

in ajax we can send the request to server and get responce 
from the server without submit the page(clicking button and 
send the form ).