What is Ajax ?
AJAX is about updating parts of a web page, without reloading the whole page.
Ajax is a group of interrelated Web development techniques used on the client-side to create asynchronous Web applications.
AJAX allows web pages to be updated asynchronously by exchanging small amounts of data with the server behind the scenes. This means that it is possible to update parts of a web page, without reloading the whole page.
Classic web pages, (which do not use AJAX) must reload the entire page if the content should change.
Examples of applications using AJAX: Google Maps, Gmail, Youtube, and Facebook tabs.
XML is commonly used as the format for receiving server data, although any format, including plain text, can be used.
AJAX is a web browser technology independent of web server software.
A user can continue to use the application while the client program requests information from the server in the background
AJAX is based on the following open standards:
1)Browser-based presentation using HTML and Cascading Style Sheets (CSS)
2)Data stored in XML format and fetched from the server
3)Behind-the-scenes data fetches using XMLHttpRequest objects in the browser
Video Tutorial For Ajax?