function envoyer_a_un_ami(str)
{
	var scriptUrl		= LOCATION_HOSTNAME+"/P02_md_envoi_mail_annonce.php";
	var retour		= null;
	scriptUrl 	+= str;
	if (chargerPage(scriptUrl,"GET","")!=null)
    document.getElementById ("ResultatAmi").innerHTML = "<span style='color:red'>Message envoyé!</span>";
}