AJAX? Who uses it? Whats it for? Are their any websites that are popular made in AJAX?

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brandon

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AJAX? Who uses it? Whats it for? Are their any websites that are popular made in AJAX? Is it a good language for me to learn?
I want to make asp.net websites like myspace and microsoft.com but what about AJAX? does anyone use it?
 
AJAX - Asynchronous Java And Xml

It is not a language; it is a method for dynamic content
It generally uses Javascript.

It retrieves XML data from a certain website using one of three constructors:
new XMLHttpRequest(); //In all good browsers (NOT IE)
new ActiveXObject("Msxml2.XMLHTTP") //Newer IE
new ActiveXObject("Microsoft.XMLHTTP") //Older IE

Google and Yahoo! both use AJAX, to name but a few.
 
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