philo = new Image();
philo.src = "images/philosophie_g.gif";
philob = new Image();
philob.src = "images/philosophie_b.gif";

kontakt = new Image();
kontakt.src = "images/kontakt_g.gif";
kontaktb = new Image();
kontaktb.src = "images/kontakt_b.gif";

agbs = new Image();
agbs.src = "images/agbs_g.gif";
agbsb = new Image();
agbsb.src = "images/agbs_b.gif";