What is AJAX?
•Asynchronous Java And XML
•Not a range of abrasive cleaning products
•A programming paradigm not a language
•Arrived in the 1990s - not a new idea
•Uses a collection of open technologies
–XHTML, CSS, JavaScript, DOM and XmlHttpRequest
•Straddles the worlds of client-side and server-side scripting
•Developers need to understand both worlds  to use AJAX properly