function info_zone(zone) {
    $('#recap_zone').hide();
    jQuery.ajax({
        type : "POST",
        url: 'ajax/info_zone.php',
        dataType: 'html',
        data : 'zone=' + zone,
        success : function(recup) {
            $('#recap_zone').html(recup);
            $('#recap_zone').fadeIn('slow');
        }
    });
}