var moomPos = 0;

var moomChange = function moom() {
	moomPos += 344;
	if (moomPos >= 1720) moomPos = 0;
	$('moom').setStyle('background-position', '-'+moomPos+'px 0');
}

function checkSize() {
	if ($('main').getSize().y > $('sidebar').getSize().y) {
		$('sidebar').setStyle('height', $('main').getSize().y + 'px');
	}
}
document.addEvent('domready', function() {
	moomChange.periodical(1000);
	checkSize();
});