function SetBookmark() {
  if (document.all) { //this works for IE
   var url="http://www.cdtltd.co.uk";
   var title="CDT - Cambridge Display Technology";
   window.external.AddFavorite(url,title)
  }
  else {    //this is the Netscape version
   if(navigator.appName == "Netscape") {
    alert("Bookmark Us Now! Press (CTRL-D)");
   }
  }
 }