AJAX XMLHttpRequest Object JavaScript tutorial

AJAX is a Web development technique that is used to create dynamic Web applications. AJAX is not a technology in it's own right but rather a approach based on a combnation of existing technologies. The main advantage that AJAX-based applications have over conventional Web applications is that a Web pages HTML elements can be populated with out first refreshing the page. This in theory, if not always in practise, leads to shorter responce times and facilitates the creation of more dynamic user interaction.