function isValidLoginDietaForm(form) {
	var ErbckColor = "#F5FAFF";
	var CrbckColor = "#FFF";

	if(form.user_login.value.length < 1) {
		form.user_login.focus();
		form.user_login.style.background = ErbckColor;
		alert("Musisz podac swój nick.");
		return false;
	} else {
		form.user_login.style.background = CrbckColor;
	}	
	if(form.user_passwd.value.length < 1) {
		form.user_passwd.focus();
		form.user_passwd.style.background = ErbckColor;
		alert("Musisz podac swoje hasło.");
		return false;
	} else {
		form.user_passwd.style.background = CrbckColor;
	}	
	return form.submit();
//	return true;
}