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How To: Learn AJAX in 20 minutes
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11/09/2005 By Sematopia.com
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Here is a quick overview and example of AJAX in action. Before you begin, this example will only work in FireFox. You’ll have to change few things in the JavaScript for it to work in IE. The example below assumes you know the basics of PHP, you can learn as you go along if you don’t. A good reference is the base PHP website.
AJAX stands for Asynchronous JavaScript and XML. Conventional web application trasmit information to and from the sever using synchronous requests. This means you fill out a form, hit submit, and get directed to a new page with new information from the server. With AJAX when submit is pressed, JavaScript will make a request to the server, interpret the results and update the current screen. In the purest sense, the user would never know that anything was even transmitted to the server.
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