function site_recommander()
{
  var email= prompt('Recommend this site to a friend\nEnter your friend\'s email:',' ');
  var sujet= "My recommendation";
  var message= "Visit this interesting site: %0d%0a http://www.astrologizeme.com/ %0d%0aOptional message: %0d%0a";
  if (email != null)
  {
    window.location="mailto:"+email+"?subject="+sujet+"&body="+message;
  }
}