Generic pub-sub in Prototype

prototype-pub-sub.js

  PubSub = {
    initPubSub: function() {
      this._dummy = new Element('span');
    },
    fire: function(event, memo) {
     this._dummy.fire(event, memo);
    },
    observe: function(event, handler) {
      this._dummy.observe(event, handler);
    }
  }

  var MyClass = Class.create(PubSub, {
    initialize: function() {
      this.initPubSub();
    }
  });

  var myInstance = new MyClass();
  myInstance.observe('myclass:custom', function(event) {
    console.log(event);
  });
  myInstance.fire('myclass:custom', {a: 'memo'});