What Is ActionScript Good For?
Here's some of what you can do using ActionScript:
Create multiplayer games.
Create engaging, user-aware navigation.
Send data to middleware, like PHP and Cold Fusion.
Create and parse XML objects.
Allow for a more responsive Web site.
Make your site more accessible to readers.
Make your site more international in scope (Flash MX supports Unicode).
About a billion other things. You'll see.
What ActionScript Can't Do
ActionScript can't talk directly to a databaseyou'll still need to use middleware, like PHP, Cold Fusion, or ASP, to do that.
You can't use exception handling with try, throw, or catch.