var charlie = new Actor();

function Actor(name) {
    this.name = name;
}

Actor.prototype.act = function(line) {
    alert(this.name + ': ' + line);
};

function Actor(name) {
    this.name = name;
}

Actor.prototype.canSpeak = true;

function SilentActor() {
    Actor.apply(this, arguments);
}

SilentActor.prototype = new Actor();
SilentActor.prototype.canSpeak = false;

///Our 'actor' object has some properties...
var actor = {
  canAct: true,
  canSpeak: true
};


var silentActor = Object.create(actor); ///'silentActor' inherits from 'actor'
silentActor.canSpeak = false;

///'busterKeaton' inherits from 'silentActor'
var busterKeaton = Object.create(silentActor);

Object.getPrototypeOf(busterKeaton); // silentActor
Object.getPrototypeOf(silentActor); // actor
Object.getPrototypeOf(actor); // Object