if (document.images)
 {
  image1on = new Image();
  image1on.src = "img/subnavi/navi_on-01.gif";
  image1off = new Image();
  image1off.src = "img/subnavi/navi_off-01.gif";

  image2on = new Image();
  image2on.src = "img/subnavi/navi_on-02.gif";
  image2off = new Image();
  image2off.src = "img/subnavi/navi_off-02.gif";

  image3on = new Image();
  image3on.src = "img/subnavi/navi_on-03.gif";
  image3off = new Image();
  image3off.src = "img/subnavi/navi_off-03.gif";

  image4on = new Image();
  image4on.src = "img/subnavi/navi_on-04.gif";
  image4off = new Image();
  image4off.src = "img/subnavi/navi_off-04.gif";

  image5on = new Image();
  image5on.src = "img/subnavi/navi_on-05.gif";
  image5off = new Image();
  image5off.src = "img/subnavi/navi_off-05.gif";

  image6on = new Image();
  image6on.src = "img/subnavi/navi_on-06.gif";
  image6off = new Image();
  image6off.src = "img/subnavi/navi_off-06.gif";

  image7on = new Image();
  image7on.src = "img/subnavi/impressum_on3.gif";
  image7off = new Image();
  image7off.src = "img/subnavi/impressum_off.gif";

  image8on = new Image();
  image8on.src = "img/subnavi/navi_on-08.gif";
  image8off = new Image();
  image8off.src = "img/subnavi/navi_off-08.gif";
 }

function changeImages()
  {
  document[changeImages.arguments[0]].src = eval(changeImages.arguments[1] + ".src");
  }