U1 = new Image(); 
U1.src = "pfeil_links.gif"; 
A1 = new Image(); 
A1.src = "pfeil_links_a.gif";
U2 = new Image(); 
U2.src = "pfeil.gif"; 
A2 = new Image(); 
A2.src = "pfeil_a.gif";
U3 = new Image(); 
U3.src = "fenster_symbol.gif"; 
A3 = new Image(); 
A3.src = "fenster_symbol_a.GIF";
U4 = new Image(); 
U4.src = "gaestebuch_zu.jpg"; 
A4 = new Image(); 
A4.src = "gaestebuch.jpg";
U5 = new Image(); 
U5.src = "button_a.jpg"; 
A5 = new Image(); 
A5.src = "button.jpg";
U6 = new Image(); 
U6.src = "1.gif"; 
A6 = new Image(); 
A6.src = "spitzre.GIF";
U7 = new Image(); 
U7.src = "1.gif"; 
A7 = new Image(); 
A7.src = "spitzli.gif";
function bt(Bildnr,Bildobjekt)
{ window.document.images[Bildnr].src = Bildobjekt.src; }