if (document.images) {
  image1on = new Image();
  image1on.src = "images/home1.JPG";

  image2on = new Image();
  image2on.src = "images/research1.JPG";

  image3on = new Image();
  image3on.src = "images/infra1.JPG";

  image4on = new Image();
  image4on.src = "images/projects1.JPG";

  image5on = new Image();
  image5on.src = "images/publications1.JPG";

  image6on = new Image();
  image6on.src = "images/people1.JPG";

  image7on = new Image();
  image7on.src = "images/news1.JPG";

  image8on = new Image();
  image8on.src = "images/sitemap1.JPG";

  image1off = new Image();
  image1off.src = "images/home.JPG";

  image2off = new Image();
  image2off.src = "images/research.JPG";

  image3off = new Image();
  image3off.src = "images/infra.JPG";

  image4off = new Image();
  image4off.src = "images/projects.JPG";

  image5off = new Image();
  image5off.src = "images/publications.JPG";

  image6off = new Image();
  image6off.src = "images/people.JPG";

  image7off = new Image();
  image7off.src = "images/news.JPG";

  image8off = new Image();
  image8off.src = "images/sitemap.JPG";

  image1over = new Image();
  image1over.src = "images/home3.JPG";

  image2over = new Image();
  image2over.src = "images/research3.JPG";

  image3over = new Image();
  image3over.src = "images/infra3.JPG";

  image4over = new Image();
  image4over.src = "images/projects3.JPG";

  image5over = new Image();
  image5over.src = "images/publications3.JPG";

  image6over = new Image();
  image6over.src = "images/people3.JPG";

  image7over = new Image();
  image7over.src = "images/news3.JPG";

  image8over = new Image();
  image8over.src = "images/sitemap3.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");
    }
  }
}