function checkQty(){
	//check quantity field
	if (document.order.quantity.value.length == 0 || document.order.quantity.value == 0 || isNaN(document.order.quantity.value)){
		alert("Quantity error - ensure only a number great than zero is entered.");
		document.order.quantity.focus();
		return false;
	} else if (document.order.country.value == 0){
		alert("Please select a country.");
		document.order.country.focus();
		return false;
	} else {
		calculateTotal();
	} 
}

function calculateTotal() {	

	//get quantity
	qty = document.order.quantity.value;

	//set postage prices
	australia=14.95 * qty;
	international=40.00 * qty;

	//set unit price
	unitprice = document.order.amount.value;

	//if posting to australia
	if (document.order.country.value == 1){
		totalprice = unitprice * qty;
		grandtotal = totalprice + australia;
		roundedtotal = grandtotal.toFixed(2);
		document.order.total.value = roundedtotal;
		document.order.add.value = qty;
		document.order.shipping.value = australia;
	}
	
	//if posting to international
	if (document.order.country.value == 2){
		totalprice = unitprice * qty;
		grandtotal = totalprice + international;
		roundedtotal = grandtotal.toFixed(2);
		document.order.total.value = roundedtotal;
		document.order.add.value = qty;
		document.order.shipping.value = international;
	}
}

function iteminfo() {
	if (checkQty() == false) { return false; }
	calculateTotal();
	return true;
}