function updateProductLayer(f, id)
{

	eval("var radio = f.type_" +id+ ";");
	type = "";
	for(i=0; i<radio.length; i++)
	{
		if(radio[i].checked==true)
		{
			type = radio[i].value;
		}
	}
	
	eval("var price = prices['" +type+ "_" +id+ "'];");
	eval("var code = codes['" +type+ "_" +id+ "'];");
	document.getElementById('price_'+id).innerHTML='$' +price+ 'ea';
	document.getElementById('code_'+id).innerHTML=code;

	// update quantities;
	eval("var qty = qtys['" +type+ "_" +id+ "'];");
	if(qty>1)
	{
		eval("var list = f.qty_" +id+";");
		for(i=0; i<list.length; i++)
		{
			list[i].value = (i+1) * qty;
			list[i].text  = (i+1) * qty;
		}
	}
}

function addProduct(f, id){
	f.id.value=id;
	eval('f.quantity.value=f.qty_' +id+ '[f.qty_' +id+ '.selectedIndex].value;');

	eval("var radio = f.type_" +id+ ";");
	if(radio.value==undefined)// value is a radio box.
	{
	
		type = "";
		for(i=0; i<radio.length; i++)
		{
			if(radio[i].checked==true)
			{
				type = radio[i].value;
			}
		}
		if(type.length>0)
		{
			f.type.value=type;
			f.submit();
		}
		else {
			self.alert("Please Select a Product Type");
		}
	}
	else {	 // value is singular and is a hidden field
		f.type.value=radio.value;
		f.submit();
	}

}

function validateSecureForm(f) {
	var ccform = false;

	if ( validateFilled(f.card_name, 'name') &&
		validateFilled(f.cc1, 'Credit card number') &&
		validateFilled(f.cc2, 'Credit card number') &&
		validateFilled(f.cc3, 'Credit card number') &&
		validateFilled(f.cc4, 'Credit card number') &&
		validateNumber(f.cc1, 'Credit card number', 4) &&
		validateNumber(f.cc2, 'Credit card number', 4) &&
		validateNumber(f.cc3, 'Credit card number', 4) 
		){

		var cvv_number=4;
		if(f.card_type[f.card_type.selectedIndex].value=="Amex")
		{	// validate for 3 CC numbers at end (AMEX cards are 15 in length)

			cvv_number=4;
			if(!validateNumber(f.cc4, 'Credit card number', 3))
			{
				return false;
			}
		}
		else {
			cvv_number=3
			if(!validateNumber(f.cc4, 'Credit card number', 4))
			{
				return false;
			}
		}

//	if(!validateNumber(f.card_cvv, 'Credit card security code', cvv_number))
//		{
//			return false;
//		}

		var currentMonth = parseInt("02");
		var currentYear  = parseInt("20");
		var ccMonth = parseFloat(f.card_expiry_month[f.card_expiry_month.selectedIndex].value);
		var ccYear  = parseFloat(f.card_expiry_year[f.card_expiry_year.selectedIndex].value);

		var ccvalid = false;
       
		if( ccYear > currentYear || ( ccYear == currentYear && ccMonth >= currentMonth ) )
		{	// cc is valid
			return true;
		}
		else {
			self.alert("Please enter a valid expiry date");
			return false;
		}
	}
	else {
		return false;
	}
}

function submitSecure(f)
{
	if(validateSecureForm(f))
	{
		f.submit();
	}
}

function backSecureForm(f)
{
	f.section.value="getcc";
	f.submit();
}


function submitDetails(f)
{

   /* 
	var postage_valid = false;
	 if(f.country[f.country.selectedIndex].value != f.country_original.value)
	{
		self.alert("You have changed your Country from when you previously calculated your postage.\n\nPlease click on 'Calculate Postage' again.");
		return false;
	}
	else {
		if(f.postage_calculated.value==1)
		{
			postage_valid = true;
		}
		else {
			self.alert("Please click on 'Calculate Postage' before continuing.");
			return false;
		}
	}
  */
  
   var postage_valid = true;
	if(postage_valid)
	{
		if(f.country[f.country.selectedIndex].value!="Australia" && f.payment_method[f.payment_method.selectedIndex].value!="credit")
		{
			self.alert("You may only pay for your order via Credit Card because you are outside Australia.");
			return false;
		}
		else if (f.payment_method.selectedIndex==0)
		{
			self.alert("Please select a payment method.");
			return false;
		}
		else if (validateFilled(f.firstname, 'First Name') && validateFilled(f.surname, 'Surname') &&
			validateEmail(f.email, 'Email Address') &&
			validateFilled(f.postal, 'Postal Address') && validateFilled(f.suburb, 'Suburb/City/Town') &&
			validateFilled(f.postcode, 'Post/Zip Code') && validatePhone(f.phone_home, 'Home Phone') &&
			validatePhone(f.phone_work, 'Work Phone') && validatePhone(f.phone_mobile, 'Mobile Phone') ){

			f.submit();
			
		}
	}
}

function getPostage(f)
{
	f.action="checkout.php";
	f.form_action.value="updatePostage";
	f.submit();
}

function submit_subscriber(f)
{
	if(validateFilled(f.subscriber_first_name, 'First Name') && validateFilled(f.subscriber_last_name, 'Surname') &&
			validateEmail(f.subscriber_email, 'Email Address'))
	{
		f.submit();
	}
}