JavaScript Functional Inheritance

Taken from Douglas Crockford:

function gizmo(id) {
    return {
        id: id,
        toString: function () {
            return "gizmo " + id;
        }
    };
}

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

JS Fiddle: http://jsfiddle.net/stevenhollidge/FGbX6/