最简单的“发布订阅”

  var EventCenter = (function(){
    var events = {};
   /*{
       my_event: [{handler: function(data){xxx}}, {handler: function(data){yyy}}]
     }
  */
  //绑定
    function on(event,handler){
      events[event] = events[event]||[];
      events[event].push({handler});
    }
  //触发
    function fire(event,args){
      if(!event[event]) return;
      for(var i=0;i<event[event].length;i++){
        events[event][i].handler(args);
      }
    }

    return {
      on,
      fire
    };
  })();

  EventCenter.on('myevent',function(data){
    console.log('myevent received...');
  })
   EventCenter.on('myevent',function(data){
    console.log('myevent2 received...');
  })
  EventCenter.fire('myevent');