function OnClickShippingMethod(whichButton)
{
	if (whichButton == 'CATALOGONLY') {
		if (document.checkout.CATALOGONLY.value == "false") {
			window.alert("You may only select this option if ordering only the Accessories Catalog.\nPlease select a different shipping option.");
			document.checkout.SHIP[0].checked=false;
		}
		else {
			// no payment is required if shipping catalog only so disable all payment options
			var i=0;
			for (i=0; i<3; i++) {
				document.checkout.PAY[i].checked=false;
				document.checkout.PAY[i].disabled=1;
			}
		}
	}
	else {
		if (document.checkout.CATALOGONLY.value == "true") {
			window.alert("\"Catalog Only\" is your only shipping option when ordering only the Accessories Catalog.");
			document.checkout.SHIP[0].checked=true;
			document.checkout.SHIP[1].checked=false;
			document.checkout.SHIP[2].checked=false;
			document.checkout.SHIP[3].checked=false;
			document.checkout.SHIP[4].checked=false;
		}
		else {
			// enable all payment options in case they were disabled
  			if ((whichButton == 'UPS') || (whichButton == 'FEDEX')) {
				document.checkout.PAY[0].disabled=0;
			}
			else
			{	
				document.checkout.PAY[0].checked=false;
				document.checkout.PAY[0].disabled=1;
			}
			document.checkout.PAY[1].disabled=0;
			document.checkout.PAY[2].disabled=0;
		}
	}
}

function OnClickPaymentMethod(whichButton)
{
	if (document.checkout.SHIP[0].checked == true) {
		window.alert("No payment is required when shipping catalog only.");
		var i=0;
		for (i=0; i<3; i++) {
			document.checkout.PAY[i].checked=false;
		}
	}
	else if (whichButton == 'COD') {
		if ((!document.checkout.SHIP[1].checked == true) &&  // SHIP[1] == UPS
			(!document.checkout.SHIP[2].checked == true)) {  // SHIP[2] == FEDEX
			window.alert("COD option is available only for UPS or FEDEX shipments.\nPlease select a UPS or FEDEX shipping method above.");
			document.checkout.PAY[0].checked=false;
		}
	}
}