if (document.images)
{

  image1on = new Image();
  image1on.src="/images/seminar/larbresle01_150_zoom.jpg";
  image1off = new Image();
  image1off.src="/images/seminar/larbresle01_150.jpg";

  image2on = new Image();
  image2on.src="/images/seminar/larbresle03_150_zoom.jpg";
  image2off = new Image();
  image2off.src="/images/seminar/larbresle03_150.jpg";

  image3on = new Image();
  image3on.src="/images/seminar/larbresle06_150_zoom.jpg";
  image3off = new Image();
  image3off.src="/images/seminar/larbresle06_150.jpg";

  image4on = new Image();
  image4on.src="/images/seminar/larbresle13_150_zoom.jpg";
  image4off = new Image();
  image4off.src="/images/seminar/larbresle13_150.jpg";
}

function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
    }
  }
}