konamiCodeListener.js

var obj = {
  konamiCodeActive: false,
  konamiCodeListener: function() {
  	if ( window.addEventListener ) {
  		var kkeys = [], konami = "38,38,40,40,37,39,37,39,66,65";
  		window.addEventListener("keydown", function(e){
  			kkeys.push( e.keyCode );
  			if ( kkeys.toString().indexOf( konami ) >= 0 && !obj.konamiCodeActive) {
  				obj.konamiCodeActive = true;
  				
  				// Do SECReT STuFF HERE
  				
  			}
  		}, true);
  	}
  }
}