function favoris()
{
    new Ajax.Request(base_url() + 'index.php/ajax/nom_site/', {
        method: 'post',

        onSuccess: function(transport)
        {
            var site = transport.responseText;
            site = site.replace(''', '\'');

            if ( navigator.appName != 'Microsoft Internet Explorer' )
            {
                window.sidebar.addPanel(site, base_url(),'');
            }
            else
            {
                window.external.AddFavorite(base_url(), site);
            }
        }
    });
}