This document discusses about Ajax implementation with Perl.
The term Ajax stands for ‘Asynchronous JavaScript And XML’. It is not a technology but a set of technologies being used together in a particular way. With effective use of existing technologies like HTML, DHTML, DOM, CSS, JavaScript one can make web pages more dynamic and interactive.
Using JavaScript, Ajax makes an asynchronous call to the server and fetches an XML document from a server-side component. Upon completion of the request, JavaScript may be used to update or modify the Document Object Model (DOM) of the HTML page. Only the necessary portions of the HTML DOM are re-rendered in the HTML page. In short Ajax techniques let you update parts of your web page without reloading the whole page.
The general benefit here is that an asynchronous operation executes in a separate thread. So when an operation is triggered asynchronously by the application, it can continue executing while the asynchronous method performs its task. Moreover only the data that needs to be updated or inserted can be sent instead of sending the entire form data.
Popular web applications like Orkut, Gmail, Amazon etc are using Ajax.
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