function valid(id_sond,id_rep){
	//dans une nouvelle fenetre
	//window.open('http://www.sondage.easyvoyage.com/sond.php?id_sond='+id_sond+'&id_rep='+id_rep,'reponse','width=880,height=700,scrollbars=0');
	//dans la mm fenetre
	window.location.href="http://www.sondage.easyvoyage.com/sond.php?id_sond="+id_sond+"&id_rep="+id_rep;
}