// JavaScript Document
	function get_radio_value() {
		var f = document.forms[0];
		for (var i=0; i < f.destzone.length; i++)
			{
			 if (f.destzone[i].checked)
					{
					var rad_val = f.destzone[i].value;
					return rad_val;
					}
			}
	}
	
	function changeShipping () {
		var f = document.forms[0];
		
		// Init values
		f.shippingorder.value = 0;
		var destzone = get_radio_value();
		var totalq = 0;
						
		if (f.qty1.value != "") {totalq = totalq + parseInt(f.qty1.value);}
		if (f.qty2.value != "") {totalq = totalq + parseInt(f.qty2.value);}
		if (f.qty3.value != "") {totalq = totalq + parseInt(f.qty3.value);}
		
		// Posters
		if (totalq < 3) {
			f.posterprice1.value = 15.00;
			f.posterprice2.value = 15.00;
			f.posterprice3.value = 15.00;
		} else {
			f.posterprice1.value = 13.50;
			f.posterprice2.value = 13.50;
			f.posterprice3.value = 13.50;
		}
		
		if (totalq > 0) {
			if (destzone == "oz") {
				f.shippingorder.value = toDollarsAndCents(parseFloat(6.00));
			} else {
				f.shippingorder.value = toDollarsAndCents(parseFloat(9.00));
			}
		}
		f.totalorder.value = toDollarsAndCents((parseFloat(totalq) * parseFloat(f.posterprice1.value)) + parseFloat(f.shippingorder.value));
			
	}
			
	function toDollarsAndCents(n) {
		var s = "" + Math.round(n * 100) / 100
		//alert(s);
		var i = s.indexOf('.')
		//alert(i);
		if (i < 0) return s + ".00"
		var t = s.substring(0, i + 1) + s.substring(i + 1, i + 3)
		if (i + 2 == s.length) t += "0"
		return t
	}				
	
	function checkPrices() {
		var f = document.forms[0];
	
		if (f.qty1.value == "0" && f.qty2.value == "0" && f.qty3.value == "0" && f.qty1.value == "" && f.qty2.value == "" && f.qty3.value == "") {
			alert('Please enter a poster quantity before clicking on purchase');
			f.qty1.focus();
			return false;
		}
		else {
			f.price1.value = f.posterprice1.value;
			f.price2.value = f.posterprice2.value;
			f.price3.value = f.posterprice3.value;
			
			if (readCookie('shipval')==undefined) {
				f.shipping.value = parseFloat(f.shippingorder.value);
			} else {
				f.shipping.value = parseFloat(readCookie('shipval')) + parseFloat(f.shippingorder.value);
			}
			createCookie('shipval',f.shipping.value);
			//alert(toDollarsAndCents(f.qty1.value * 2.9));
			//changeShipping();	
			f.submit();
		}
	}