naviOn1 = new Image(); 
naviOn1.src = "images/pfeil1.gif";
naviOn2 = new Image(); 
naviOn2.src = "images/pfeil2.gif";
naviOn3 = new Image(); 
naviOn3.src = "images/pfeil3.gif";
naviOn4 = new Image(); 
naviOn4.src = "images/pfeil4.gif";
naviOn5 = new Image(); 
naviOn5.src = "images/pfeil5.gif";
naviOn6 = new Image(); 
naviOn6.src = "images/pfeil6.gif";

function Bildwechsel(Zielbild,Bildobjekt) {
  Zielbild.src = Bildobjekt.src;
}