function validate_buy_form(buyForm) {
	with (buyForm) {
		if (validation_required(itemno, "Please select a " + itemnoFieldLabel.value)==false) {
			itemno.focus();
			return false;
		}
	}
}

function validation_required(field, alertText) {
	with (field) {
		if ((value == null) || (value == "")) {
			alert(alertText);
			return false;
		} else {
			return true;
		}
	}
}