Definition: ActionScript is the name of the programming language used to develop applications for Flash. When combined with Flash animation and graphic objects, it can be used to gather data and dynamically manipulate objects and events while a Flash movie is running. ActionScript is similar in some ways to JavaScript, and in others to Visual Basic, but its basis relies on events, handlers, and classes that perform specific functions based on the movie's timeline and certain established conditions.
ActionScript
By Adrien-Luc Sanders, About.com Guide
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