function gallery (ID) {
  NewWindow = window.open("http://www.wandern-im-harz.de/bildgalerie/"+ID+"/", "Gallery", "width=800,height=600,resizable=no,location=no,menubar=no,scrollbars=no,dependent=yes");
  NewWindow.focus();
}
 // ,resizable=no,location=no,menubar=no,scrollbars=no,dependent=yes