Hineritance in Javascript by __proto__ property

gistfile1.js

// source: <http://www.2ality.com/2011/11/javascript-classes.html>
var PersonProto = {
    describe: function () {
        return "Person called " + this.name;
    },
};
var jane = {
    __proto__: PersonProto,
    name: "Jane",
};
var tarzan = {
   __proto__: PersonProto,
   name: "Tarzan",
};