Functions & the new keyword

gistfile1.js

function Car(){
  this.wheels = 4;
}

var redCar = new Car();
console.log('1: ' + typeof redCar);
console.log('2: ' + redCar.wheels);

var otherCar = Car();
console.log('3: ' + typeof otherCar);
console.log('4: ' + window.wheels);
console.log('5: ' + otherCar.wheels);