SOURCE

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

Person.prototype.sayName = function () {
	console.log(this.name);
};

var person1 = new Person('timo', 3);
var person2 = new Person('anni', 1);

console.log(person1.name);
console.log(person2.name);

console.log(person1.sayName());
console.log(person2.sayName());