Ajax stands for Asynchronous Javascript And XML.
According to wikipedia Asynchronous JavaScript and XML, or Ajax, is a web development technique for creating interactive web applications using a combination of:
-> HTML (or XHTML) and CSS for presenting information
-> The Document Object Model (DOM) manipulated through JavaScript to dynamically display and interact with the information presented
-> The XMLHttpRequest object to exchange data asynchronously with the web server. (XML is commonly used, although any format will work, including preformatted HTML, plain text, JSON and even EBML)
GMail interface can be called as an AJAX interface, but the real AJAX apps are like the new yahoo mail beta.
AJAX apps are superfast and provide a rich user interface.
Which version of opera are you using coz all new version of leading browsers now suport AJAX. Heres the list:
Apple Safari 1.2 and above
Konqueror
Microsoft Internet Explorer (and derived browsers) 4.0 and above
Mozilla Firefox (and derived browsers) 1.0 and above
Netscape 7.1 and above
Opera 7.6 and above
Also check if you have made changes to Javascript and CSS settings in your browser or disabled it.
