function Photogallery_NextImage(a)
{
    a.href = a.href + '&_ajax_call=1';
    var url = a.href;
    var params = '';
    var myAjax = new Ajax.Updater(
         "foto"
        ,url
        ,{
             'method':'get'
            ,'onFailure':function () { location.href = url+"?"+params;  }
            ,'onLoaded':function ()
            {
                Photogallery_Load();
            }
         }
    );
    return false;
}