function Widget () {
  this._events = {};

  this.on = function(name, callback){

    if ( ! $.isFunction(callback) ) return this;

    if ( this._events[name] == undefined )
      this._events[name] = [];

    this._events[name].push(callback);

  }
}

var Widget () {
  _events: {},

  on: function(name, callback){

    if ( ! $.isFunction(callback) ) return this;

    if ( this._events[name] == undefined )
      this._events[name] = [];

    this._events[name].push(callback);

  }
}