Javascript constructors and the prototype object

gistfile1.js

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

Person.prototype.speak = function () {
  return "Hello, my name is " + this.name;
}

Person.prototype.canVote = function() {
  return this.age >= 18;
}

person = new Person("John Doe", 30)
person.speak();
person.canVote();