function setupNav()
{	
	setHoverClasses('a.nav', 'nav', 'navon');
	setHoverClasses('a.navsb', 'navsb', 'navsbon');	
	setHoverClasses('a.pnt', 'pnt', 'pnton');	

	pnt = new HoverImg('paintings', '../images/nav/paintingsov.gif');
	abt = new HoverImg('about', '../images/nav/aboutov.gif');
	cnt = new HoverImg('contact', '../images/nav/contactov.gif');
	hm = new HoverImg('home', '../images/nav/homeov.gif');	
}