function validateForm()  {
	if ( document.getElementById("email").value.match(/^[_A-Za-z0-9-]+(\.[_A-Za-z0-9-]+)*@[A-Za-z0-9-]+(\.[A-Za-z0-9-]+)*$/) == null) {
		alert("Vyplòte email.");
		document.getElementById("email").focus();
		return false;
	}
	document.getElementById("mailing").submit();
	return true;
}