function bookmark() {
  var url=location.href;
  var title=document.title;
  if(window.sidebar) window.sidebar.addPanel(title,url,"");
  else if(window.external && window.ActiveXObject) window.external.AddFavorite(url,title);
  else if(window.opera && window.print)
  {
    var elem = document.createElement('a');
    elem.setAttribute('href',url);
    elem.setAttribute('title',title);
    elem.setAttribute('rel','sidebar');
    elem.click();
  }
  else alert("Press OK then Ctrl-D (Macs: Command-D) to bookmark this page.");
}