function checkContactForm() {
	var e = document.getElementById('felado');
	if (!e.value.match(/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i)) {
		alert('The sender address is invalid!');
		e.focus();
		return false;
	}

	e = document.getElementById('tema');
	if (e.value.match(/^ *$/)) {
		alert('The subject box is empty!');
		e.focus();
		return false;
	}

	e = document.getElementById('uzenet');
	if (e.value.match(/^ *$/)) {
		alert('The message box is empty!');
		e.focus();
		return false;
	}

	return true;
}