Object Oriented Javascript : Prototypal Approach

person_prototype.js

// Prototypal Approach

var person = {
  firstName: 'Anonymous',
  lastName: 'Not Known',

  create: function(firstName, lastName) {
    self = Object.create(this);
    self.firstName = firstName;
    self.lastName = lastName;
    return self;
  },

  fullName: function() {
    return(this.firstName + ' ' + this.lastName);
  },

  introduce: function() {
    return('Hello! I am ' + this.fullName() + '. Pleased to meet you!');
  }
}

var ema = person.create('Eliza', 'Abraham');

ema.introduce();