Bookmark/Add Your Webpage

IE Favorite

if (window.external) {
  window.external.AddFavorite(location.href, document.title);
}

Mozilla Firefox Bookmark

if (window.sidebar) {
  window.sidebar.addPanel(location.href, document.title, "");
}

Opera Hotlist

if (window.opera && window.print) {
  this.title = document.title;
  return true;
}