function setupNav()
{	
	setHoverClasses('a.nav', 'nav', 'navov');
    
    about = new HoverImg('#abtnav', 'images/nav/abouton.gif');
    collabor = new HoverImg('#collabnav', 'images/nav/collabon.gif');
    press = new HoverImg('#pressnav', 'images/nav/presson.gif');
    contact = new HoverImg('#contnav', 'images/nav/contacton.gif');            
   
}