active1 = new Image(26,26);
 active1.src = "img/but1b.png";
 inactive1 = new Image(26,26);
 inactive1.src = "img/but1a.png";

active2 = new Image(26,26);
 active2.src = "img/but2b.png";
 inactive2 = new Image(26,26);
 inactive2.src = "img/but2a.png";

active3 = new Image(26,26);
 active3.src = "img/but3b.png";
 inactive3 = new Image(26,26);
 inactive3.src = "img/but3a.png";
 
active4 = new Image(26,26);
 active4.src = "img/but4b.png";
 inactive4 = new Image(26,26);
 inactive4.src = "img/but4a.png";

active5 = new Image(26,26);
 active5.src = "img/but5b.png";
 inactive5 = new Image(26,26);
 inactive5.src = "img/but5a.png";

active6 = new Image();
 active6.src = "img/pauschal.png";
 inactive6 = new Image();
 inactive6.src = "img/pauschal2.png";

active7 = new Image();
 active7.src = "img/hotel.png";
 inactive7 = new Image();
 inactive7.src = "img/hotel2.png";

active8 = new Image();
 active8.src = "img/fluege.png";
 inactive8 = new Image();
 inactive8.src = "img/fluege2.png";

active9 = new Image();
 active9.src = "img/auto.png";
 inactive9 = new Image();
 inactive9.src = "img/auto2.png";

function Bildwechsel (Bildnr, Bildobjekt) {
  window.document.images[Bildnr].src = Bildobjekt.src;
}