if ((navigator.appVersion.substring(0,1) >= 3) && 
    (navigator.appName == ("Netscape") || 
    (navigator.appName == "Microsoft Internet Explorer"))) {
     offImages = new Array();
     onImages = new Array();
     for (var i = 0; i<= 8; i++) {
          offImages[i] = new Image();
          offImages[i].src = "images/n" + i + "d.jpg";
          onImages[i] = new Image();
          onImages[i].src = "images/n" + i + "s.jpg";
     }
}
function select(i) {
   if (document.images) {
      var itemname = "n" + i;
      document.images[itemname].src = onImages[i].src;
  }
}
function deselect(i) {
   if (document.images) {
      var itemname = "n" + i;
      document.images[itemname].src = offImages[i].src;

   }
}