if (document.images) {
  side_image1on = new Image();
  side_image1on.src = "../images/nws_nav_media_r.gif";

  side_image2on = new Image();
  side_image2on.src = "../images/nws_nav_pr_r.gif";
  
  side_image3on = new Image();
  side_image3on.src = "../images/news_nav_awards_r.gif";

  side_image4on = new Image();
  side_image4on.src = "../images/nws_nav_presskit_r.gif";

  side_image1off = new Image();
  side_image1off.src = "../images/nws_nav_media.gif";

  side_image2off = new Image();
  side_image2off.src = "../images/nws_nav_pr.gif";

  side_image3off = new Image();
  side_image3off.src = "../images/news_nav_awards.gif";
  
  side_image4off = new Image();
  side_image4off.src = "../images/nws_nav_presskit.gif";

}

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");
    }
  }
}