Play with node.js events. Make your own events.

EventEmitter

var EventEmitter = require('events').EventEmitter;
var util = require('util');
// create the class
var MyClass = function () {}
util.inherits(MyClass, EventEmitter);

var obj = new MyClass();
//add the listeners
obj.on('myevent',function(){
	console.log('my event emit');
});
obj.on('myevent',function(arg){
	console.log('my event emit with arg:',arg);
});
obj.on('myevent',function(arg,arg2){
	console.log('my event emit with args:',arg,arg2);
});
//emit the event
obj.emit('myevent','hello','world');