div.obra {clear: both; float: left; background: url( '../img/obra_en_t.gif' ) no-repeat; width:47px;}
div.expos {clear: both; float: left; background: url( '../img/expos_en_t.gif' ) no-repeat; width:135px;}
div.agenda {clear: both; float: left; background: url( '../img/agenda_en_t.gif' ) no-repeat; width:183px;}
div.links {clear: both; float: left; background: url( '../img/links_en_t.gif' ) no-repeat; width:45px;}
div.contact {clear: both; float: left; background: url( '../img/contacte_en_t.gif' ) no-repeat; width:67px;}
div.dossier {clear: both; float: left; background: url( '../img/dossier_en.gif' ) no-repeat; width:147px;}

div.obra a { background: url( '../img/obra_en.gif' ) no-repeat; }
div.expos a { background: url( '../img/expos_en.gif' ) no-repeat; }
div.agenda a { background: url( '../img/agenda_en.gif' ) no-repeat; }
div.links a { background: url( '../img/links_en.gif' ) no-repeat; }
div.contact a { background: url( '../img/contacte_en.gif' ) no-repeat; }
div.dossier a {background: url( '../img/dossier_en.gif' ) no-repeat; }