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JBoss Portals and AJAX - Part 1

Jan 30, 2009, 04:33 (0 Talkback[s])
(Other stories by Ramanujam Rao)

[ Thanks to Sanjiv Lavangare for this link. ]

"Asynchronous communication between the client and the server forms the backbone of AJAX. Although an asynchronous request-response method can provide significant value in the development of rich functionality by itself, the results are lot more pronounced when used in conjunction with other functional standards such as CSS, DOM, JavaScript, and so on. The predominant popularity of AJAX stems from such usage.

"Client-server communication can be achieved either by using IFrames, or by using the supported JavaScript function called XMLHttpRequest(). Due to certain limitations of IFrames, XMLHttpRequest has gained a lot more acceptance. While IFrame can also be an effective option for implementing AJAX-based solutions, in this article, we will focus largely on an XMLHttpRequest-based implementation. The primary advantage of using AJAX-based interfaces is that the update of content occurs without page refreshes. A typical AJAX implementation using XMLHttpRequest happens as described in the following steps:"

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