function validate_required(field,alerttxt){
	with (field){
		if (value==null||value==""){
			alert(alerttxt);
			return false;
		}
		return true;
	}
}

function validate_email(field,alerttxt){
	with (field){
		apos=value.indexOf("@");
		dotpos=value.lastIndexOf(".");
		if (apos<1||dotpos-apos<2){
			alert(alerttxt);
			return false;
		}
		return true;
	}
}

function validate_contactusForm(thisform){
	with (thisform){
		if(!validate_required(q_name, "Name is not allow null!")){
			q_name.focus();
			return false;
		}
		if(!validate_required(q_tel, "Phone is not allow null!")){
			q_tel.focus();
			return false;
		}
		if(!validate_required(q_email, "Email is not allow null!")){
			q_email.focus();
			return false;
		}
		if(!validate_email(q_email, "Email is incorrect!")){
			q_email.focus();
			return false;
		}
//		if(!validate_required(q_subject, "必須填寫主旨")){
//			q_subject.focus();
//			return false;
//		}
//		if(!validate_required(query, "必須填寫內容")){
//			query.focus();
//			return false;
//		}
	}
	return true;
}