jquery konami code plugin

exampleUsage.js

(function($) {   
 $(document).ready(function() {
   $(document).konami(function() {
        var s = document.createElement('script');
        s.type = 'text/javascript';
        document.body.appendChild(s);
        s.src = 'http://erkie.github.com/asteroids.min.js';
    });
   $(document).konami(function() {
        var u = navigator.userAgent.toLowerCase(), v = (u.match(/.+?(?:rv|it|ra|ie)[\/: ]([\d.]+)/) || [0, '0'])[1];
        if (/msie/.test(u) && parseInt(v, 10) <= 9) {
            if (confirm('Ready to kill the iexplorer?')) {
                window.open('', '_parent', '');
                window.close();
            }
        }
    }, { 'code': [73, 69, 83, 85, 67, 75, 83] });  //iesucks
 });
})(jQuery);

jquery.konami.js

(function($) {  
  //konami code plugin
    $.konami = {
        defaults: {
            'code': [38, 38, 40, 40, 37, 39, 37, 39, 66, 65],
            'step': 0
        }
    };

    $.fn.konami = function(fn, options) {
        var opts = $.extend({}, $.konami.defaults, options);
        return this.each(function() {
            $(this).bind('konami.' + opts.code.join(''), fn)
               .bind('keyup', function(event) {
                   if (event.keyCode == opts.code[opts.step])
                       opts.step++;
                   else
                       opts.step = 0;

                   if (opts.step == opts.code.length) {
                       $(this).trigger('konami.' + opts.code.join(''));
                       opts.step = 0;
                   }
               });
            return this;
        });
    };
})(jQuery);