This book teaches ActionScript to both aspiring ActionScript developers and experienced ones who want to upgrade their knowledge to the new version. It details how to use ActionScript through both Flash CS2 and Flex 2 (open source ActionScript developers should also be able to make use of the book). Coverage focuses on essential real world techniques and assumes no previous ActionScript knowledge. In addition, the book features a host of practical examples; reference sections are also included at the back of the book allowing the reader to easily look up syntax.