div.obra {clear: both; float: left; background: url( '../img/obra_t.gif' ) no-repeat; width:43px;}
div.expos {clear: both; float: left; background: url( '../img/expos_t.gif' ) no-repeat; width:198px;}
div.agenda {clear: both; float: left; background: url( '../img/agenda_t.gif' ) no-repeat; width:181px;}
div.links {clear: both; float: left; background: url( '../img/links_t.gif' ) no-repeat; width:71px;}
div.contact {clear: both; float: left; background: url( '../img/contacte_t.gif' ) no-repeat; width:76px;}
div.dossier {clear: both; float: left; background: url( '../img/dossier.gif' ) no-repeat; width:162px;}

div.obra a { background: url( '../img/obra.gif' ) no-repeat; }
div.expos a { background: url( '../img/expos.gif' ) no-repeat; }
div.agenda a { background: url( '../img/agenda.gif' ) no-repeat; }
div.links a { background: url( '../img/links.gif' ) no-repeat; }
div.contact a { background: url( '../img/contacte.gif' ) no-repeat; }
div.dossier a {background: url( '../img/dossier.gif' ) no-repeat; }