(function($) {

  $.fn.konami = function(callback, code) {
    if(code == undefined) code = "38,38,40,40,37,39,37,39,66,65";
    
    return this.each(function() {
      var kkeys = [];
      $(this).keydown(function(e){
        kkeys.push( e.keyCode );
        if ( kkeys.toString().indexOf( code ) >= 0 ){
          $(this).unbind('keydown', arguments.callee);
          callback(e);
        }
      }, true);
    });
  }

})(jQuery);