function checkOtazka() {
	var ok = true;
	var f = window.document.form;
	var todo = "Zadajte prosím: "
	
	if (form.meno.value.length == 0) { ok = false; todo = todo + "meno a priezvisko"; }
	if (form.email.value.length == 0) { if (!ok) {todo = todo + ", ";} ok = false; todo = todo + "e-mail"; }
	if (form.text.value.length == 0) { if (!ok) {todo = todo + ", ";} ok = false; todo = todo + "otázka"; }
	if (!ok) {
		window.alert("Nevyplnili ste všetky položky formuláru.\n"+todo+".");
		return false;		
	}
	form.action = "4.php";
	form.submit();	
	return true;
}

function openpopup3(popurl){
	var winpops=window.open(popurl,"","toolbar=no,width=870,height=617,directories=no,status=no,scrollbars=no,resizable=no,menubar=no,title=no")
	}