AJAX Introduction: AJAX is a developer's dream, because you can: Update a web page without reloading the page Request data from a server - after the page has loaded Receive data from a server - after the page has loaded Send data to a server - in the background What is AJAX? AJAX = A synchronous J avaScript A nd X ML. AJAX is not a programming language. AJAX just uses a combination of: A browser built-in XMLHttpRequest object (to request data from a web server) JavaScript and HTML DOM (to display or use the data) Note : AJAX allows web pages to be updated asynchronously by exchanging data with a web server behind the scenes. This means that it is possible to update parts of a web page, without reloading the whole page. How AJAX Works: 1. An event occurs in a web page (the page is loaded, a button is clicked) 2. An XMLHttpRequest object is created by JavaScript 3. The XMLHttpRequest object sends a request to a web serv...