function validate_form() {

	var err=""
	if(document.getElementById("Amount").value == 0) {
		alert("You have not placed any items in your basket");
		return false;
	}
	
	if(document.getElementById("CustomerName").value == "") err=err+"* Your name\n";
	if(document.getElementById("CustomerEmail").value == "") err=err+"* Your email address\n";
	if(document.getElementById("CustomerTelephone").value == "") err=err+"* Your telephone number\n";	
	
	if(document.getElementById("CustomerAddress01").value == "") err=err+"* Billing address\n";
	if(document.getElementById("CustomerTown").value == "") err=err+"* Billing city\n";
	if(document.getElementById("CustomerPostcode").value == "") err=err+"* Billing postcode\n";	
	
	if(document.getElementById("delivery_Address").value == "") err=err+"* Delivery address\n";
	if(document.getElementById("delivery_City").value == "") err=err+"* Delivery city\n";
	if(document.getElementById("delivery_postcode").value == "") err=err+"* Delivery postcode\n";	

	if(err!="") {
		alert("Please complete the following fields:\n\n"+err);
		return false;
	}
	
	return true;	
}

function same_details(yes_no) {
	if (yes_no == "y") {
		document.getElementById("delivery_Address").value = document.getElementById("CustomerAddress01").value;
		document.getElementById("delivery_City").value = document.getElementById("CustomerTown").value;
		document.getElementById("delivery_postcode").value = document.getElementById("CustomerPostcode").value;
	}
	else if (yes_no == "n") {
		document.getElementById("delivery_Address").value = ""
		document.getElementById("delivery_City").value = ""
		document.getElementById("delivery_postcode").value = ""
	}
}