function onCDSelect ()
{
var dvorak = document.getElementById('nr_dvorak').value;
var haydn = document.getElementById('nr_haydn').value;
var mozart = document.getElementById('nr_mozart').value;
var handling = 0;

var total = parseFloat(haydn) + parseFloat(dvorak) + parseFloat(mozart);
if (total > 5) {
	alert("Als u meer dan 5 CD\'s wenst te bestellen, neemt u dan eerst contact met ons op.");
}

price = (total * 15);

if (total > 0) {
	 handling = 2;
}

document.getElementById('price1').value = price;
document.getElementById('handling').value = handling;
document.getElementById('price2').value = price + parseFloat(handling);

}