What is AJAX?
Using AJAX has a number of advantages. In a lot of cases, related pages on a website contain numerous similarities in the content contained on them. Since AJAX runs in the background and leaves the existing page unaffected, the need for content to be reloaded on every request is not needed. AJAX will request only the data which needs to be changed, greatly reducing load time. Many users believe websites using AJAX to be generally faster, even if it has not changed on the server-side. AJAX results in pleasing web browsers and less strain on servers.