img91 = new Image();
img91.src ="/neu/nav/buero.png";
img92 = new Image();
img92.src ="/neu/nav/buero_f2.png";
img93 = new Image();
img93.src ="/neu/nav/logo.png";
img94 = new Image();
img94.src ="/neu/nav/logo_f2.png";