Subpub 订阅/发布

    var Pubsub = (function (window) {
        window.handlers = {};
        var o = {
            pub: function () {
                var args = Array.prototype.slice.call(arguments,0),
                        event = args.shift();

                var cbs = handlers[event];
                if (cbs) {
                    for (var i = 0; i < cbs.length; i++) {
                        cbs[i].apply(cbs[i].args);
                    }
                }
            },
            sub: function (event, callback) {
                if (!handlers[event]) {
                    handlers[event] = [];
                }
                handlers[event].push(callback);
            }
        };
        o.publish = o.pub;
        o.subscribe = o.sub;

        return o;

    })(window);

    Pubsub.sub("click", function () {
        console.log('1 click');
    })
    Pubsub.sub("click", function () {
        console.log('2 click');
    })