AJAX Overview

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What is AJAX

AJAX stands for Asynchronous Javascript And XML.

AJAX became very popular in 2005: Google used AJAX in the search box to return as you type suggested entries for your search. It is not a new programming language, but instead a new way of using existing technology with existing standards.

AJAX enables a website to load data faster and present users with less loading time.

AJAX is based on standard Javascript and HTTP requests.

In Javascript there exists an object called XMLHttpRequest. This object enables the client side to exchange data with a server with out reloading the page.

This object must exist in a web brower’s rendention of the Document Object Model (DOM). These are the minimum versions of which web browsers that can be used with AJAX:

  • Internet Explorer 5.0
  • Safari 1.2
  • Mozilla 1.0 / Firefox
  • Opera 8
  • Netscape 7

Take a look at the other sub-menu items in this AJAX category to learn how to program your very own AJAX code.

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