Ajax(Asynchronous JavaScript and XML) Technology
Ajax (sometimes called Asynchronous JavaScript and XML) is a way of programming for the Web that gets rid of the hourglass. Data, content, and design are merged together into a seamless whole. When your customer clicks on something on an Ajax driven application, there is very little lag time. The page simply displays what they're asking for.
What is Ajax?
Ajax is a way of developing Web applications that combines:
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XHTML and CSS standards based presentation
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Interaction with the page through the DOM
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Data interchange with XML and XSLT
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Asynchronous data retrieval with XMLHttpRequest
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JavaScript to tie it all together