Scope summary

package{

　//Global scope
　
　public class A　{

　　//Class scope

　　public static function b():void
　　{
　　　　//Static method scope
　　}

　　public function c():void
　　{
　　　　//Class method scope

　　　　function d():void{
　　　　　　// Nested method scope
　　　　}
　　}

　}

}

// Global scope

注意：global scope有兩處

add at 2010/4/8

Conditionals and loops do not have their own scope in ActionScript3.

(p.335 in Chapter 17: Namespaces)

That's why the complier always issues a warning message "Duplicate variable definition" when I put following codes in a function.

for(var i:int = 1; i < 10; i++)
　doSomething();
}

for(var i:int = 1; i < 10; i++)
　doSomething();
}

this thread also talked about same issue.