Creating Prototype objects with JavaScript

javascript_prototype_objects.js

// Defining constructor function
function ObjectConstructor(message) {
  // TODO: Add your own initialization code here
  this.message = message || 'Hello Prototype World!';
};

// Defining an instance function
ObjectConstructor.prototype.sayHello = function() {
  alert(this.message);
};

// Using your Prototype object

var object = new ObjectConstructor();
object.sayHello();

var object = new ObjectConstructor('Hello Mexpolk!');
object.sayHello();