User Guide

666 Chapter 2: ActionScript Language Reference
Object.__proto__
Availability
Flash Player 5.
Usage
myObject.__proto__
Description
Property; refers to the prototype property of the constructor function that created myObject.
The
__proto__ property is automatically assigned to all objects when they are created. The
ActionScript interpreter uses the
__proto__ property to access the prototype property of
the object’s constructor function to find out what properties and methods the object inherits
from its class.