function swapImage(name,maxCounter,action)
{
if (typeof swapImage.counter == 'undefined') {
  swapImage.counter=1;
}
if (action == 'weiter') {
  swapImage.counter=swapImage.counter+1;
  if (swapImage.counter == maxCounter+1) {swapImage.counter=maxCounter;}
} else if (action == 'zurueck') {
  swapImage.counter=swapImage.counter-1;
  if (swapImage.counter == 0) {swapImage.counter=1;}
} else if (action == 'Anfang') {
  swapImage.counter=1;
} else if (action == 'Ende') {
  swapImage.counter=maxCounter;
}
Bild=new String();
Bild='0' + swapImage.counter;
Bild=Bild.substr(Bild.length-2,2);
document.images[name].src='./galerie/pic' + Bild + '.jpg';
document.images[name].alt='Bild ' + Bild + ' von ' + maxCounter + ' Bildern';
document.images[name].title='Bild ' + Bild + ' von ' + maxCounter + ' Bildern';
}