function verifFormulaire( form )
{ 
  var err="";
  var nb_err = 0;
  for( i=0; i < form.elements.length; i++ )
    {
      if(  form.elements[i].name != ""  )
	{
	  if( form.elements[i].name.substring(0,1) == "*" )
	    {
	      if( form.elements[i].value == "" )
		{
		  err += "    - " + form.elements[i].name.substring( 1,form.elements[i].name.length )  + "\n";
		  nb_err ++;
		}
	    }
	}
    }
  if( nb_err == 0 )
    {
      return true;
    }
  if( nb_err == 1 )
    {
      out = "Merci de renseigner ce champ : \n";
    }
  else
    {
      out = "Merci de renseigner ces champs : \n";
    }
  alert( out + err );
  return false;
}