O'Reilly Master Class: Douglas Crockford--JavaScript: The Good Parts March 30, 2009

JavaScript: The Good Parts
Like most languages, JavaScript contains both good and bad parts. The
bad parts keep it from becoming an elegant, lightweight, and highly
expressive language. In this class, you'll discover good JavaScript you
can use to create truly extensible code. The author of "JavaScript: The
Good Parts," (O'Reilly Media), Crockford is a regular speaker at
conferences on advanced JavaScript topics. He serves on the JavaScript
2.0 committee at ECMA. Register by March 15 and get an extra $50 off.

Official Website: http://training.oreilly.com/javascript