if (document.images) {
  n1 = new Image(); n1.src = 'image/navigation/home.gif';
  h1 = new Image(); h1.src = 'image/navigation/home_o.gif';

  n2 = new Image(); n2.src = 'image/navigation/hintergrund.gif';
  h2 = new Image(); h2.src = 'image/navigation/hintergrund_o.gif';

  n3 = new Image(); n3.src = 'image/navigation/archiv.gif';
  h3 = new Image(); h3.src = 'image/navigation/archiv_o.gif';
  
  n4 = new Image(); n4.src = 'image/navigation/mediadaten.gif';
  h4 = new Image(); h4.src = 'image/navigation/mediadaten_o.gif';
  
  n5 = new Image(); n5.src = 'image/navigation/kontakt.gif';
  h5 = new Image(); h5.src = 'image/navigation/kontakt_o.gif';
  
  n6 = new Image(); n6.src = 'image/navigation/links.gif';
  h6 = new Image(); h6.src = 'image/navigation/links_o.gif';
  
  n7 = new Image(); n7.src = 'image/navigation/top.gif';
  h7 = new Image(); h7.src = 'image/navigation/top_o.gif';
  
  n8 = new Image(); n8.src = 'image/navigation/gewinner.gif';
  h8 = new Image(); h8.src = 'image/navigation/gewinner_o.gif';
}

function Bildwechsel(Bild,Objekt)
{
  if (document.images)
    document[Bild].src = Objekt.src;
}