Nieznany błąd czasu wykonania

function edycja() {
    var nota = $("nota_wew_nr").value;
    advAJAX.get({
                url : "index.php",
                parameters : {
                  "funkcja" : "rozliczenie_pojazdow_ajax",
                  "axn" : "edycja_diet",
                  "nota" : nota
                },
                mimeType: 'text/html',
                uniqueParameter: "custom_unique_param1",
                onInitialization : function() {$('diety_body').innerHTML = '<tr height="40"><td colspan="7" style="font-weight: bold">Pobieranie danych...</td></tr>';},
                onSuccess : function(obj) {$('diety_body').innerHTML = obj.responseText;},
                onFinalization :  function() {update_nota_nr(); update_dane();},
                onError : function(obj) { alert("Error: " + obj.status);}
    });
    $("samochod").style.display = "block";
    advAJAX.get({
                url : "index.php?funkcja=rozliczenie_pojazdow_ajax&axn=edycja_pojazdow&nota="+nota,
                mimeType: 'text/html',
                uniqueParameter: "custom_unique_param2",
                onInitialization : function() {$('samochod_body').innerHTML = '<tr height="40"><td colspan="9" style="font-weight: bold">Pobieranie danych...</td></tr>';},
                onSuccess : function(obj) {$('samochod_body').innerHTML = obj.responseText;},
                onFinalization :  function() {update_pojazdy(); $('do_druku').disabled=false;},
                onError : function(obj) { alert("Error: " + obj.status);}
    });
}