JS object linking through prototype chains

obj-linking.js

var Person = {
    first: undefined,
    last: undefined,
    personMethod: function personMethod() {
        console.log( this.first, this.last);
    }
};

var Employee = Object.create(Person);
Employee.position = undefined;
Employee.employeeMethod = function employeeMethod() {
    console.log(this.position);
};

var Manager = Object.create(Employee);
Manager.position = 'Manager';
Manager.department = undefined;
Manager.managerMethod = function() {
  console.log(this.department);
};

// Using a new object
var manager = Object.create(Manager);
manager.first = 'Tom';
manager.last = 'Jones';
manager.department = 'Housewares';

manager.employeeMethod(); // Manager
manager.personMethod(); // Tom Jones
manager.managerMethod(); // Housewares