document.onkeyup = keyPress;
var pressNo = 0;
var pressArray = new Array(38,38,40,40,37,39,37,39,66,65);
function keyPress() {
	if (pressNo < pressArray.length && event.keyCode == pressArray[pressNo]) {
		pressNo++;
		if (pressNo == pressArray.length) {
			document.getElementById('body').style.backgroundColor = '#000000';
			var images = document.getElementsByTagName('div');
			for (var i=0;i<images.length;i++)
				images[i].style.backgroundImage = images[i].style.backgroundImage.replace('/round','/roundb');
		}
	} else pressNo = 0;
}