function addFavorites(){
  if(document.all)
    window.external.AddFavorite('http://www.infernal-sudoku.com/', 'Infernal-Sudoku.com - the most infernal sudoku on the web');
  else
    alert('You can type CTRL + D to add this page to your bookmarks, or favorites.');
  return false;
}
function makeHomePage(obj){
  if(document.all && document.getElementById){
    obj.style.behavior='url(#default#homepage)';
    obj.setHomePage('http://www.infernal-sudoku.com/');
  }else{
    alert('Sorry, this function is only available with Internet Explorer 5+');
  }
  return false;
}