A Collection of Ajax Tutorials

AJAX Tutorial from w3schools
AJAX is not a new language, but just a new way to use existing standards.
With AJAX you can create better, faster, and more user friendly web applications.
AJAX is based on JavaScript and HTTP requests.
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Ajax in action
This is a very basic tutorial for Ajax newbie.It tells you how to build your first [...]

JPSpan

JPSpan is an Ajax framework built with the intention of integrating client-side JavaScript with serverside code written in PHP. Download
JPSpan works by analyzing a PHP class using reflection. It then emits a number of JavaScript methods that accept the same arguments as the methods of the class on the server. When one of these methods [...]

Ajax Tutorial: Monitoring Server Status

The XMLHTTPRequest object contains mechanisms by which we can know the progress of our Ajax request and determine when the information returned by the server is ready to use in our application.
The readyState property of the XMLHTTPRequest object gives you information from the server about the current state of a request you have made.
Possible Values

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