AJAX is a technique for creating attractive fast and dynamic web pages.
AJAX is not a new programming language but it starts a new use exacting standards.
Before using or creating AJAX you should knowledge of the following:
AJAX is the art of exchanging data on the server and update part of web pages without uploading the whole page.
If you want to get any information from a database on the server it had take lot of time to access the data. The user click "Submit" button the wait for the server response , then the page will open.
AJAX you will be able to access the data with the web server without having to load a new page.
Microsoft stared building ASP.NET AJAX, the Ajax Framework that is now fully integrated in ASP.NET and Visual Web Developer 2008. This framework offers a number of benefits as a web
developer to create attractive application.