div.nav_projects {
background: url( 'http://www.aart.dk/gfx/tempsite/nav/ro_projects.jpg' ) top left no-repeat;
position:absolute; top:42px; left:-26px;}
div.nav_coworkers {
background: url( 'http://www.aart.dk/gfx/tempsite/nav/ro_practice.jpg' ) top left no-repeat;
position:absolute; top:42px; left:80px;} 
div.nav_contact {
background: url( 'http://www.aart.dk/gfx/tempsite/nav/ro_contact.jpg' ) top left no-repeat;
position:absolute; top:42px; left:591px;}

div.nav_projects a {background: url( 'http://www.aart.dk/gfx/tempsite/nav/ro_projects.jpg' ) 0 -29px no-repeat;}
div.nav_coworkers a {background: url( 'http://www.aart.dk/gfx/tempsite/nav/ro_practice.jpg' ) 0 -29px no-repeat;}
div.nav_contact a {background: url( 'http://www.aart.dk/gfx/tempsite/nav/ro_contact.jpg' ) 0 -29px no-repeat;}