function WM_preloadImages() {
  if (document.images) {
    if (typeof(document.WM) == 'undefined'){
      document.WM = new Object();
    }
    document.WM.loadedImages = new Array();
    var argLength = WM_preloadImages.arguments.length;
    for(arg=0;arg<argLength;arg++) {
      document.WM.loadedImages[arg] = new Image();
      document.WM.loadedImages[arg].src = WM_preloadImages.arguments[arg];
    }
  }
}
WM_preloadImages('/images/nav1on.gif','/images/nav2on.gif','/images/nav3on.gif','/images/nav4on.gif','/images/nav5on.gif');

if (document.images) {
  nav1New = new Image;
  nav1Org = new Image;
  nav2New = new Image;
  nav2Org = new Image;
  nav3New = new Image;
  nav3Org = new Image;
  nav4New = new Image;
  nav4Org = new Image;
  nav5New = new Image;
  nav5Org = new Image;
  nav1New.src = "/images/nav1on.gif";
  nav1Org.src = "/images/nav1off.gif";
  nav2New.src = "/images/nav2on.gif";
  nav2Org.src = "/images/nav2off.gif";
  nav3New.src = "/images/nav3on.gif";
  nav3Org.src = "/images/nav3off.gif";
  nav4New.src = "/images/nav4on.gif";
  nav4Org.src = "/images/nav4off.gif";
  nav5New.src = "/images/nav5on.gif";
  nav5Org.src = "/images/nav5off.gif";
} else {
  nav1New = "";
  nav1Org = "";
  document.nav1 = "";
  nav2New = "";
  nav2Org = "";
  document.nav2 = "";
  nav3New = "";
  nav3Org = "";
  document.nav3 = "";
  nav4New = "";
  nav4Org = "";
  document.nav4 = "";
  nav5New = "";
  nav5Org = "";
  document.nav5 = "";
}