function ajax_sitescontent(idCath)
{
    advAJAX.setDefaultParameters({
    onInitialization : function(obj) { document.getElementById(obj.tag).innerHTML = "Przygotowywanie..."; },
    onLoading : function(obj) { document.getElementById(obj.tag).innerHTML = "Pobieranie danych..."; },
    onSuccess : function(obj) { document.getElementById(obj.tag).innerHTML = "" + obj.responseText; },
    onError : function(obj) { document.getElementById(obj.tag).innerHTML = "Błąd..."; }
    });
 advAJAX.get({ url: 'sitestext.php?idCath='+idCath, tag: 'ajaxcontent'});
}