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This AJAX tutorial will teach you what is AJAX and how to use AJAX programming tools. AJAX is coming from Asynchronous JavaScript And XML. AJAX is programming technique combining client JavaScript code and Server-Side HTTP Requests. AJAX stands more popular in 2005 with Google Suggest.

To see how AJAX work, we will develop small AJAX Web Application. First of all we need some HTML file with forms to input data. This will be one input field where we can write some text – in our case this will be some name. This HTML file we will save under ajax.html name. The code of HTML file we can get from bellow: (Please note that the text input handle onkeypress event and call to ajax(); function on this event and there is no "Submit" button in HTML form)

AJAX is modern new technology which gives you an advanced way to improve the quality, speed and interactivity of internet applications. But the applications which intensively using AJAX, have one problem. To request data they make a URL post to server side script. This URL is cached by the client browser and even the server will serve new data, old data will be received by the browser.