Create custom events for sequences of key presses.
Create a custom event by calling addKeySequence with an event name and an array of key names:
#JS
Element.Events.addKeySequence('konamicode', 'up up down down left right left right b a'.split(' '));
Now you can attach handlers to this new event:
#JS
document.addEvent('konamicode', function() { alert('KONAMI'); });
For more examples please check out the demo!