normaljahrgang = new Image();
normaljahrgang.src = "images/buttons/normal/bjahrgang.jpg";     /* button normal */
hoverjahrgang = new Image();
hoverjahrgang.src = "images/buttons/hover/bjahrgang.jpg"; /* button hover */
activejahrgang = new Image();
activejahrgang.src = "images/buttons/active/bjahrgang.jpg"; /* button active */

normalkalender = new Image();
normalkalender.src = "images/buttons/normal/bkalender.jpg";     /* button normal */
hoverkalender = new Image();
hoverkalender.src = "images/buttons/hover/bkalender.jpg"; /* button hover */
activekalender = new Image();
activekalender.src = "images/buttons/active/bkalender.jpg"; /* button active */

normalgalerie = new Image();
normalgalerie.src = "images/buttons/normal/bgalerie.jpg";     /* button normal */
hovergalerie = new Image();
hovergalerie.src = "images/buttons/hover/bgalerie.jpg"; /* button hover */
activegalerie = new Image();
activegalerie.src = "images/buttons/active/bgalerie.jpg"; /* button active */

normaldownloads = new Image();
normaldownloads.src = "images/buttons/normal/bdownloads.jpg";     /* button normal */
hoverdownloads = new Image();
hoverdownloads.src = "images/buttons/hover/bdownloads.jpg"; /* button hover */
activedownloads = new Image();
activedownloads.src = "images/buttons/active/bdownloads.jpg"; /* button active */

normalforum = new Image();
normalforum.src = "images/buttons/normal/bforum.jpg";     /* button normal */
hoverforum = new Image();
hoverforum.src = "images/buttons/hover/bforum.jpg"; /* button hover */
activeforum = new Image();
activeforum.src = "images/buttons/active/bforum.jpg"; /* button active */

normalguestbook = new Image();
normalguestbook.src = "images/buttons/normal/bguestbook.jpg";     /* button normal */
hoverguestbook = new Image();
hoverguestbook.src = "images/buttons/hover/bguestbook.jpg"; /* button hover */
activeguestbook = new Image();
activeguestbook.src = "images/buttons/active/bguestbook.jpg"; /* button active */

normallinks = new Image();
normallinks.src = "images/buttons/normal/blinks.jpg";     /* button normal */
hoverlinks = new Image();
hoverlinks.src = "images/buttons/hover/blinks.jpg"; /* button hover */
activelinks = new Image();
activelinks.src = "images/buttons/active/blinks.jpg"; /* button active */

normalsiteinfo = new Image();
normalsiteinfo.src = "images/buttons/normal/bsiteinfo.jpg";     /* button normal */
hoversiteinfo = new Image();
hoversiteinfo.src = "images/buttons/hover/bsiteinfo.jpg"; /* button hover */
activesiteinfo = new Image();
activesiteinfo.src = "images/buttons/active/bsiteinfo.jpg"; /* button active */

normalhome = new Image();
normalhome.src = "images/buttons/normal/bhome.jpg";     /* button normal */
hoverhome = new Image();
hoverhome.src = "images/buttons/hover/bhome.jpg"; /* button hover */
activehome = new Image();
activehome.src = "images/buttons/active/bhome.jpg"; /* button active */
/* usw. fuer alle weiteren zu benutzenden Grafiken */

/*function buttonchange (nr, button) {
  window.document.images[nr].src = button.src;
}
  */
  
var arrClicked = new Array(9);
function buttonchange(nr, button) {
if(/active/.test(button.src)) {
arrClicked = new Array(9);
arrClicked[nr] = true;
window.document.images[nr].src = button.src;
for(var i=0; i<=arrClicked.length; i++) {
if(arrClicked[i] != true) {
window.document.images[i].src = window.document.images[i].src.replace('active', 'normal');
}
}
} else {
if(arrClicked[nr] != true) {
window.document.images[nr].src = button.src;
}
}
}