Method overloading in js

js_proto_method_overloading.js

var Person = function () {
  this.name = "unnamed";
};

Person.prototype.getName = function () {
  return this.name;
};

var Student = function () {
  this.name = "Student";
};

Student.prototype = new Person();

Student.prototype.getName = function() {
  // Student.prototype.constructor points to Person function
  return "Mr " + Student.prototype.constructor.prototype.getName.call(this);
};

var b = new Student();
console.log(b.getName()); // "Mr Student"