Inheritance example Javascript

gistfile1.js

// Parent class with two properties, one integer and one object
var ParentClass = function() {
	this.counter = 0;
	this.obj = { counter : 0 };
	this.inca = function() {
		this.counter++;
		this.obj.counter++;
	}
};

// Dummy child class
var ChildClass = function() {};

// Let ChildClass inherit from ParentClass
ChildClass.prototype = new ParentClass();
ChildClass.prototype.constructor = ChildClass;

var c1 = new ChildClass();
var c2 = new ChildClass();

c1.inca();

console.log(c1.counter + ', ' + c1.obj.counter);
console.log(c2.counter + ', ' + c2.obj.counter);