function setupNav()
{	
	setHoverClasses('a.nav', 'nav', 'navon');
	setHoverClasses('a.subs', 'subs', 'subson');
	setHoverClasses('a.nums', 'nums', 'numson');	

	work = new HoverImg('artwork', 'images/home/artworkon.gif');
	art = new HoverImg('artist', 'images/home/artiston.gif');
	cnt = new HoverImg('contact', 'images/home/contacton.gif');		
}