Ajax (Asynchronous Javascript and XML) builds on common web skills to enable developers to create Web 2.0-style applications quickly and without back-end infrastructure changes. Many Ajax toolkits, libraries and frameworks are available, including Dojo, Zimbra AjaxTK, jQuery, and JSon, and Ajax support in Ruby on Rails. For more information see: Hot Skills: Ajax - fast route to Web 2.0-style applications
Training
Most frameworks come with their own tutorials. A number of training companies offer Ajax for the usual commercial rates - £1,050-plus for a three-day course.
How difficult is it to master?
Ajax development requires skills on both client and server side. The OpenAjax Alliance says, "On the client side, developers may need to familiarise themselves with one or more Ajax client-side toolkits, along with programming techniques for incremental DOM updates, XHLHttpRequest-based client-server communications, and asynchronous communications event handling. Most of these techniques require incremental knowledge on top of existing expertise with HTML and Javascript."
