Object.prototype inheritance

function Person(name) {
  this.name = name;
}

Person.prototype.sayHello = function() { console.log('Hello, my name is ' + this.name + '!'); }

function Student(name, id) {
  Person.call(this, name);
  this.id = id;
}

Student.prototype = Object.create(Person.prototype, {
  sayHello: {
    value: function() { 
      Person.prototype.sayHello.call(this, arguments);
      console.log('My id is ' + this.id + '.');
    }
  }
});

Student.prototype.constructor = Student;


new Person(randomName())

new Student(randomName(), randomNumber(100));