var kkeys = [];
var konami = "38,38,40,40,37,39,37,39,66,65";

var konami_callback = function(e) {
	kkeys.push(e.keyCode);
	if (kkeys.toString().indexOf( konami ) >= 0 )
	{
		kkeys = [];
		$('.spaceinvaders').animate({left: '+=100%'}, 3000)
				 .animate({top: '+=150'}, 300)
				 .animate({left: '-=100%'}, 3000)
				 .animate({top: '-=150'}, 300);
	}
}

if(window.addEventListener)
{
	document.addEventListener("keydown", konami_callback, true);
}
else if(window.attachEvent)
{
	document.attachEvent("onkeydown", konami_callback);
}