function register(obj) {
    var events = {};
    for (var prop in obj) {
        if (typeof obj[prop] == 'function') {
            obj[prop] = (function (x_oldFunc) {
                return function () {
                    events.before && events.before.call(obj);
                    x_oldFunc.apply(obj, arguments);
                    events.after && events.after.call(obj);
                };
            })(obj[prop]);
        }
    }
    obj.on = function (eventName, func) {
        if (typeof func != 'function') {
            return;
        }
        events[eventName] = func;
    };
}