gistfile1.js

var makePerson = function (name, age) {
  var me = {}, my = {};


	//members
	my.name = name;
	my.age = age;

	//private methods
	my.incrementAge = function () {
		my.age++;
	}

	//public methods
	me.say = function () {
		return my.name + ' is ' + my.age;
	}
	me.birthday = function () {
		my.incrementAge();
	}


	return me;//return the me object, leave the my object private
};

var a;
a = makePerson('Adam', 3);
console.log(a.say()); //3

a.birthday();
console.log(a.say()); //4