For many Web developers, making simple requests and receiving simple responses is all they will ever need, but for developers who want to master Ajax, a complete understanding of HTTP status codes, ready states, and the XMLHttpRequest object is required. In this article, Brett McLaughlin will show you the different status codes and demonstrate how browsers handle each and he will showcase the lesser-used HTTP requests that you can make with Ajax.
Original Source:http://www-128.ibm.com/developerworks/java/library/wa-ajaxintro3/index.html?ca=drs-
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