function texte_recommander()
{
  var email= prompt('Send this page to a friend\nEnter your friend\'s email:',' ');
  var sujet= "My recommendation";
  var message= "Consult this interesting page: %0d%0a " + document.location + " %0d%0aOptional message: %0d%0a";
  if (email != null)
  {
    window.location="mailto:"+email+"?subject="+sujet+"&body="+message;
  }
}