new_constructor.js

function child_of(o) {
    function F() {}
    F.prototype = o;
    return new F();
}

function Obj() {
    this.speed = 10;
}

Obj.prototype = new Object;
Obj.prototype.constructor = Object;

var car1 = new Obj();
print(car1.speed);

car2 = child_of(car1);
print(car2.speed);

functionality to inherit from old instance of 'class', not new instance