leer = new Image();
leer.src = "images/ort/leer.jpg";     /* ort normal */

jahrgang = new Image();
jahrgang.src = "images/ort/jahrgang.jpg";     /* ort hover */

kalender = new Image();
kalender.src = "images/ort/kalender.jpg";     /* ort hover */

galerie = new Image();
galerie.src = "images/ort/galerie.jpg";     /* ort hover */

downloads = new Image();
downloads.src = "images/ort/downloads.jpg";     /* ort hover */

forum = new Image();
forum.src = "images/ort/forum.jpg";     /* ort hover */

guestbook = new Image();
guestbook.src = "images/ort/guestbook.jpg";     /* ort hover */

ortlinks = new Image();
ortlinks.src = "images/ort/links.jpg";     /* ort hover */

siteinfo = new Image();
siteinfo.src = "images/ort/siteinfo.jpg";     /* ort hover */

home = new Image();
home.src = "images/ort/home.jpg";     /* ort hover */

/* usw. fuer alle weiteren zu benutzenden Grafiken */ 

function ortchange (ort) {
  window.document.images[1].src = ort.src;
}