Programming ASP.NET AJAX: Using ASP.NET AJAX JavaScript Extensions

In addition to delivering a considerable amount of Ajax functionality in an easy-to-use framework, ASP.NET AJAX provides a number of additions to JavaScript that can make client coding easier. Among these are OOP-style constructs, such as namespaces, inheritance, and interfaces, as well as client-side reimplementations that resemble .NET constructs such as StringBuilder. Also, selected JavaScript objects are enriched with new features.