AJAX and JSON


Abstract

Web application designing has by far evolved in a number of ways since the time of its birth. To make web pages more interactive various techniques have been devised both at the browser level and at the server level. The introduction of XMLHttpRequest class in the Internet Explorer 5 by Microsoft paved the way for interacting with the server using JavaScript, asynchronously. AJAX, a shorthand for Asynchronous Java And XML, is a technique which uses this XMLHttpRequest object of the browser features plus the Document Object Model and DHTML and provides for making highly interactive web applications in which the entire web page need not be changed by a user action, only parts of the page are loaded dynamically by exchanging information with the server. This approach has been able to enhance the interactivity and speed of the web applications to a great extent. Interactive applications such as Google Maps, Orkut, Instant Messengers are making extensive use of this technique. JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for human to read and write. It is easy for machine to parse and generate. It is based on a subset of the JavaScript and is language-independent.
These technologies will satisfy programmers demand for creating Interactive web applications.


Keywords: XMLHttpRequest, Document Object Model, Asynchronous, JSON
References
An Architectural Style for Ajax, Ali Mesbah and Arie van Deursen, SERG, 2006
Sang Shin, Java Technology Architect, Sun Microsystems, Inc.
http://www.json.org/




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Ahsan Ahmed

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