When Microsoft added the ActiveX XMLHTTP object to Internet Explorer’s implementation of JavaScript, the company planted the seed for the revolution in Web applications known as Asynchronous JavaScript and XML, or AJAX. Today, Firefox, Safari, Opera, and other browsers all support what is now known as XMLHttpRequest, making possible sites such as colr.org, backpackit.com, and maps.google.com. These and other sites feature applications that act and … Continue reading Speeding Up AJAX with JSON