Brief Introduction to AJAX Many of you may be wondering what is AJAX? and Why one should learn it? So let's have a look at how you can use AJAX with JavaScript, for developing a dynamic web application? Before discussing about AJAX let's have a look at how browser's get information to display a page. When a browser requests a page from a website , then the browser in your machine is acting as a client. The website is being delivered through a machine that is serving up the information, therefore we call that a server. When you ask for a page, the client makes a request to a server and the server returns a page. Sometimes when you are looking at a page you may want to ask for some additional information from the server. Say for ex: - That your page has some thumbnails for photo albums and perhaps the album has more thumbnails than you can see in the current view. Without AJAX, if you want to see more thumbnails, you would have to make a request back t...