A custom event notifier in JavaScript

notifiy.js

var events = [];

ujs.notify = function (name, params) 
{
  if (typeof(events[name]) != "undefined") {
  
    var event = events[name];

    if (params instanceof Object) {
      for(var i in params) {
	event[i] = params[i];
      }
    }

    document.dispatchEvent(event);
  }
  else {
    events[name] = document.createEvent("HTMLEvents");
    events[name].initEvent(name, true, false);

    return ujs.notify(name, params);
  }
};