function shipBill()
{
  var af = document.addform
	if (!af.ship_bill.checked)
	{
		// clear shipping fields
		af.saddr1.value = "";
		af.saddr2.value = "";
		af.scity.value = "";
		af.scountyprovince.value = "";
		af.spostalcode.value = "";
    af.scountry.value = collectionAddress.scountry;
	} else {
		// copy billing to shipping
    if ((af.ssel && af.ssel[1].checked) ||
        !af.ssel)
    {
  		af.saddr1.value = af.baddr1.value;
  		af.saddr2.value = af.baddr2.value;
  		af.scity.value = af.bcity.value;
  		af.scountyprovince.value = af.bcountyprovince.value;
  		af.spostalcode.value = af.bpostalcode.value;
      af.scountry.value = af.bcountry.value;
    }
    else if (af.ssel && af.ssel[0].checked)
    {
      // copy selection
      af.addsels.selectedIndex = af.addselb.selectedIndex;
    }
	}
}

function checkDespatch(obj)
{
  var despatchId = obj.value;
  var af = document.addform;

  if (postal[despatchId] == 1)
  {
    // postal option
    enableShipping();
  }
  else
  {
    // non-postal option
    disableShipping();
  }
}

function enableShipping()
{
  var af = document.addform;

  af.saddr1.value = "";
  af.saddr1.disabled = false;
  af.saddr1.style.background = "#fff";
  af.saddr2.value = "";
  af.saddr2.disabled = false;
  af.saddr2.style.background = "#fff";
  af.scity.value = "";
  af.scity.disabled = false;
  af.scity.style.background = "#fff";
  af.scountyprovince.value = "";
  af.scountyprovince.disabled = false;
  af.scountyprovince.style.background = "#fff";
  af.spostalcode.value = "";
  af.spostalcode.disabled = false;
  af.spostalcode.style.background = "#fff";
  af.scountry.value = "";
  af.scountry.disabled = false;
  af.scountry.style.background = "#fff";
  af.ship_bill.disabled = false;
}

function disableShipping()
{
  var af = document.addform;

  af.saddr1.value = collectionAddress.saddr1;
  af.saddr1.disabled = true;
  af.saddr1.style.background = "#ccc";
  af.saddr2.value = collectionAddress.saddr2;
  af.saddr2.disabled = true;
  af.saddr2.style.background = "#ccc";
  af.scity.value = collectionAddress.scity;
  af.scity.disabled = true;
  af.scity.style.background = "#ccc";
  af.scountyprovince.value = collectionAddress.scountyprovince;
  af.scountyprovince.disabled = true;
  af.scountyprovince.style.background = "#ccc";
  af.spostalcode.value = collectionAddress.spostalcode;
  af.spostalcode.disabled = true;
  af.spostalcode.style.background = "#ccc";
  af.scountry.value = collectionAddress.scountry;
  af.scountry.disabled = true;
  af.scountry.style.background = "#ccc";
  af.ship_bill.disabled = true;
  af.ship_bill.checked = false;
}

function selectDespatchOption()
{
  // called on page load
  var af = document.addform;

  if (!af.despatch.length &&
      af.despatch)
  {
    checkDespatch(af.despatch);
  }
  else
  {
    // find selected radio option
    for (var i =0; i < af.despatch.length; i++)
    {
      if (af.despatch[i].checked)
        checkDespatch(af.despatch[i]);
    }
  }
  if (af.ship_bill.checked)
  {
    shipBill();
  }
}

function breakout()
{
  if (self != top)
  {
    if (document.images)
    {
      top.location.replace(window.location.href);
    } else
    {
      top.location.href = window.location.href;
    }
  }
}