AJAX

AJAX=Asynchronous JavaScript And XML

AJAX is a browser technology.

AJAX is a technology that runs in your browser. It uses asynchronous data transfer between the browser and the web server,allowing web pages to request small bits of @R_377_4045@ion from the server instead of whole pages.The technology makes Internet applications smaller,faster and more user friendly.AJAX is a web browser technology independent of web server software.

AJAX is based on open standards.

The open standards used in AJAX are well defined,and suported by all major browsers. AJAX applications are browser and platform independent.(Cross-Platform,Cross-browser technology).

AJAX is about better internet applications

Web application have many benefits over desktop applications,they can reach a larger audience,they are easier to install and support,and easierto develop.However,internet applications are not always as "rich" and user-friendly as Tradtional desktop applications.With AJAX,Internet applications can be made richer(smaller,faster,and easier to use);

AJAX is based on open standards. These stantdards have been used by most developers for several years. Most existing web application can be rewritten to use AJAX technology instead of Traditional HTML forms.

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 Request to the server,and by modifying only parts of the web page using JavaScript.

The perfered way to communicate with the server is by sending data as XML (but other methods can be used). AJAX can be used to create more interactive applications.