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Ajax stands for Asynchronous JavaScript and XML. In a nutshell, it is the use of the nonstandard XMLHttpRequest object to communicate with server-side scripts. It can send as well as receive information in a variety of formats, including XML, HTML, and even text files. Ajax’s most appealing characteristic, however, is its “asynchronous” nature, which means it can do all of this without having to refresh the page. This allows you to update portions of a page based upon user events.

The two features in question are that you can:

* Make requests to the server without reloading the page
* Parse and work with XML documents

Contents:-

* 1 What's AJAX?
* 2 Step 1 – say "Please!" or How to Make an HTTP Request
* 3 Step 2 – "There you go!" or Handling the Server Response
* 4 Step 3 – "All together now!" - A Simple Example
* 5 Step 4 – "The X-Files" or Working with the XML Response

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