Alternative.js

// But I don't want a direct reference to the Parent class in my code!!

var super = function (obj) {
  return Object.getPrototypeOf(obj);
}

var Child = Object.create(Parent);
Child.hierachy = function () {
  return super(this).hierachy.call(this) + " < C";
}

constructors.js

var Parent = {
  hierachy: function () {
    return "P";
  },
  constructor: function (thing) {
    this.thing = thing;
  }
}

var Child = Object.make(Parent, {
  hierachy: function () {
    return Parent.hierachy.call(this) + " < C";
  },
  constructor: function (thing, other) {
    Parent.constructor.call(this, thing);
    this.other = other;
  }
});

var GrandChild = Object.make(Child, {
  hieracy: function () {
    return Child.hierachy.call(this) + " < GC";
  },
  constructor: function (thing, other) {
    other = other * 2;
    Child.constructor.call(this, thing, other);
  }
});

var gc = Object.create(GrandChild);
gc.constructor("thing", 42);
// or var gc = new (GrandChild.constructor)("thing", 42);
alert(gc.hierarchy()); // Alerts "P < C < GC"

counter-example.js

var Parent = {
  hierachy: function () {
    return "P";
  }
}

// Yes I cheated, I used [pd.make](https://github.com/Raynos/pd#pd.make) as sugar here. Alternatively
/*
var Child = Object.create(Parent);
Child.hierachy = function () {
  return Parent.hierachy.call(this0 + " < C";
}
*/
var Child = Object.make(Parent, {
  hierachy: function () {
    return Parent.hierachy.call(this) + " < C";
  }
});

var GrandChild = Object.make(Child, {
  hieracy: function () {
    return Child.hierachy.call(this) + " < GC";
  }
});

var gc = Object.create(GrandChild);
alert(gc.hierarchy()); // Alerts "P < C < GC"