​

        // 1. Prototype

​

        // базовая ф-ия-конст-ор

        function Rectangle(w,h){

            this.w = w;

            this.h = h;

            this.getArea = function () {

                return this.w*this.h;

            }

​

        }

​

​

        Rectangle.prototype.getArea = function () {

            return this.w*this.h;

        }

​

        var 

            rect1 = new Rectangle(10,20),

            rect2 = new Rectangle(5,20);

​

​

        var 

            area = rect1.getArea(),

            area2 = rect2.getArea();

​

        console.log(area);

        console.log(area2);

​

​