Javascript Classic Inheritance

gistfile1.txt

var Automobile = function() {
  this.automobile = true;
}

var Car = function() {
  this.car = true;
}

var Bus = function() {
  this.bus = true;
}

Car.prototype = new Automobile();
var auto = new Automobile();
var myPorsche = new Car();
var myGreyhound = new Bus();

console.log(auto);
console.log(myPorsche);