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Wednesday, June 25, 2008

What is Ajax?

Asynchronous JavaScript and XML (AJAX) enables you to create more interactive and more responsive Web applications than those that rely exclusively on complete page postbacks. With AJAX-style programming, the browser can exchange only the data it needs with the server, without having to update the complete page.

AJAX relies on the following combination of technologies:

Asynchronous communication between the browser and server by using the XMLHTTP object that is built into browsers.

A format for exchanging data between the browser and server. This format usually is XML, but it can also be JSON (as in ASP.NET AJAX) or another format.

Data presentation in the browser by using XHTML, HTML, and CSS.

Client scripting that uses the browser document object model (DOM) and JavaScript to create a responsive user interface (UI).

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