function hideNewMsg(el) {
	el.setStyle('visibility', 'hidden');
}

function showNewMsg(el) {
	el.setStyle('visibility', 'visible');
}

function toggleNewMsg() {
	$$('.fnewmsg').each(function(el) {
		if(el.getStyle('visibility') == 'hidden') showNewMsg(el);
		else hideNewMsg(el);
	});
}

window.addEvent('domready', function() {
	toggleNewMsg.periodical(750);
});