Использование "OLOO" (objects-linked-to-other-objects) стиля

oloo.js

/* POINT */

var Point = {
  init: function(x, y) {
    this.x = x;
    this.y = y;
  },
  move: function(deltaX, deltaY) {
    this.x += deltaX;
    this.y += deltaY;
  }
}

/* POINT WITH NAME */
var PointWithName = Object.create(Point);

PointWithName.initWithName = function(x, y, name) {
  this.init(x, y);
  this.name = name;
}

/* CREATE OBJECTS */

var p = Object.create(Point);
p.init(10, 10);
p.move(-2, -2);

var pWithName = Object.create(PointWithName);
pWithName.initWithName(5, 5, 'Awesome Name!');
pWithName.move(-5, -5);

console.log(p);
console.log(pWithName)