A class factory.

Class.js

/**
 * Class
 * A class factory
 */

function Class(parent, members) {

    // prepare single-inheritance
    members = members || parent;

    // setup proxy
    var Proxy = function () {};
    Proxy.prototype = (parent || Class).prototype;

    // setup constructor
    members.init = members.init || function () {};
    var Shell = members.init;

    // setup inheritance
    Shell.prototype = new Proxy();

    // setup identity
    Shell.prototype.constructor = Shell;

    // setup augmentation
    Shell.extend = function (items) {
        for (var item in items) {
            if (!Shell.prototype.hasOwnProperty(item)) {
                Shell.prototype[item] = items[item];
            }
        }
        return Shell;
    };

    // attach members and return the new class
    return Shell.extend(members);
}