Simple Javascript Inheritance

gistfile1.txt

function Utility(){};

var utility = new Utility();

Utility.prototype.extend = function () {
    function F() {}
    F.prototype = this;
    return new F();
};

// USAGE

var vehicle = {
    nuts: true,
    bolts: true
};

var car = utility.extend(vehicle);
var plane = utility.extend(vehicle);

car.wheels = true;
plane.wings = true;