function local_check_form(form_str, lng) {
	form_clean_all(form_str);
	if (!form_all_filled(form_str,1,'name_surename','e-mail','arrival_year','arrival_month','arrival_day','persons')) {
		if (lng=='en') alert('Enter required data! Marked with asterisk (*)');
		else if (lng=='de') alert('Enter required data! Marked with asterisk (*)');
		else if (lng=='ru') alert('Введите необходимые данные! Отмечено зведачкой (*)');
		else if (lng=='lt') alert('Įveskite būtinus duomenis! Pažymėta žvaigždele (*)');
		return false;
	}
	/*if (!form_validate_regexp(form_str,'email','data[req][e-mail]')) {
		alert('Įveskite teisingą el. pašto adresą!')
		return false
	}*/
	return true	
}