AJAX

AJAX is not a new language, but just a new way to use existing standards.
With AJAX you can create better, faster, and more user friendly web applications.
AJAX is based on JavaScript and HTTP requests.

AJAX is an acronym for Asynchronous JavaScript And XML.
AJAX is not a new programming language, but simply a new technique for creating better, faster, and more interactive web applications.
AJAX uses JavaScript to send and receive data between a web browser and a web server.
The AJAX technique makes web pages more responsive by exchanging data with the web server behind the scenes, instead of reloading an entire web page each time a user makes a change.

AJAX Is A Browser Technology
AJAX is a technology that runs in your browser. It uses asynchronous data transfer (HTTP requests) between the browser and the web server, allowing web pages to request small bits of information from the server instead of whole pages.
The technology makes Internet applications smaller, faster and more user friendly.

AJAX Is Based On Open Standards
AJAX is based on the following open standards:
· JavaScript
· XML
· HTML
· CSS
The open standards used in AJAX are well defined, and supported by all major browsers. AJAX applications are browser and platform independent. (Cross-Platform, Cross-Browser technology)

There is nothing new to learn.
AJAX is based on open standards. These standards have been used by most developers for several years.
Most existing web applications can be rewritten to use AJAX technology instead of traditional HTML forms.

AJAX Uses XML And HTTP Requests:
A traditional web application will submit input (using an HTML form) to a web server. After the web server has processed the data, it will return a completely new web page to the user.
Because the server returns a new web page each time the user submits input, traditional web applications often run slowly and tend to be less user friendly.
With AJAX, web applications can send and retrieve data without reloading the whole web page. This is done by sending HTTP requests to the server (behind the scenes), and by modifying only parts of the web page using JavaScript when the server returns data.
XML is commonly used as the format for receiving server data, although any format, including plain text, can be used.
You will learn more about how this is done in the next chapters of this tutorial.
More About AJAX
http://www.alistapart.com/articles/gettingstartedwithajax

Samples for AJAX
http://www.dynamicdrive.com/dynamicindex17/index.html

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