Ajax - preferred by some, hated by others

Ajax is not a genuine Joomla technology, it is just one of programming techniques to made a web page more attractive.

AJAX is an acronym in fact, (Asynchronous JavaScript and XML) and is a method of building interactive Web applications by combining several programming tools including JavaScript, which can cause a linked-to page to appear (or fail to appear) in a pop-up, hide the status bar, change text in the status bar, change text or graphics within a Web page, create new cookies, change existing cookies or read existing cookies. JavaScript code can be embedded in HTML and interpreted by the Web browser. Ajax is convenient because it allows the content on a Web page to update immediately when a user performs an action.