When Flash Player 9 released in June 2006, it introduced the new scripting language, ActionScript 3, which has already taken hold in the Adobe Flex application development community. ActionScript 3 provides not only a significant enhancement in performance, but also a more robust programming model that lends itself to complex Rich Internet Application development. For web designers and developers who need to make the move to ActionScript 3 from the previous version, ActionScript 2, the learning curve has proven to be significant. In this essential and timely guide, ActionScript expert Kris Hadlock speaks squarely to the many thousands of ActionScript 2 users who need to make the leap right away. The ActionScript Migration Guide covers all of the major changes in ActionScript from version 2 to 3. The book explains the most important and fundamental changes in ActionScript drawing comparisons between the two languages both visually and contextually. With a comprehensive index and robust table of contents designers and developers will easily be able to locate the old an/or new codes with side-by-side comparisons of how to program both and the explanation of the concepts behind them.