objectCreate.js

function Parent(name) {
  var obj = Object.create(parentProto);
  obj.name = name;
  return obj
}
var parentProto = {
  greet: function() {
    console.log("hi, I'm " + this.name); 
  }
};
var mom = Parent("Mom");
var dad = new Parent("Dad");
mom.greet();  // hi, I'm Mom
dad.greet();  // hi, I'm Dad