//order calculation ------------------------------------------------------------------------------------------------------
function calculate_subtotal(price, shipping){
	var subtotal = 0;
	var quantity = document.add_to_cart_form.quantity.value;	
	var temp = 0;
	temp = quantity*(price+shipping);
	document.add_to_cart_form.subtotal.value = currency(temp);
}

function same_as_contact(){
	document.order_form.ship_first_name.value = document.order_form.first_name.value;
	document.order_form.ship_last_name.value = document.order_form.last_name.value;
	document.order_form.ship_address.value = document.order_form.address.value;
	document.order_form.ship_address_2.value = document.order_form.address_2.value;
	document.order_form.ship_city.value = document.order_form.city.value;
	document.order_form.ship_state.value = document.order_form.state.value;
	document.order_form.ship_country.value = document.order_form.country.value;
	document.order_form.ship_zip.value = document.order_form.zip.value;
}