function error(text) {
	if (errfound) return;
		window.alert(text);
    errfound = true;
}
function validatekatalog(AForm)
{
errfound = false;
var errors = "";
with (document.forms[0])
{
if (AForm.jeden.value == "")
errors += "Podaj imię \n";
if (AForm.dwa.value == "")
errors += "Podaj email \n";
if (AForm.trzy.value == "")
errors += "Wpisz wiadomość \n";
if (errors != "")  error(errors); 
}
return !errfound;
}