My simple model of Inheritance Pattern.

inheritance_pattern.js

function Car(_name, _year) {
    this.name = _name;
    this.year = _year;
}

Car.prototype.carType = function () {
    return "My car is a " + this.name + ", this year is " + this.year + ".";
};

function CarModel(_model, _name, _year) {
    Car.call(this, _name, _year);
    this.model = _model;
}

CarModel.prototype.completeCar = function () {
    return "My car is one " + this.model + ", type " + this.name + " and your year is " + this.year + ".";
};

var car = new Car("BMW", 2015);
var completeCar = new CarModel("Galeardo", "BMW", 2015);

alert(car.carType());
alert(completeCar.completeCar());