Functional Inheritance

// Simple functional Inheritance
function gizmo(id) {
    return {
        id: id, toString: function () {
            return "gizmo " + this.id;
        }
    };
}

function hoozit(id) {
    var that = gizmo(id);
    that.test = function (testid) {
        return testid === this.id;
    };
    return that;
}

// If we add privacy to the past code we earn
function gizmo(id) {
    return {
        toString: function () {
            return "gizmo " + id;
        }
    };
}

function hoozit(id) {
    var that = gizmo(id);
    that.test = function (testid) {
        return testid === id;
    };
    return that;
}