function shippingSameAsBillingChecked ()
{
    var chkbx = document.getElementById('shipAddressSame');

    var sadd = document.getElementById('shippingAddressForm');

    var is_checked = chkbx.checked;
    
    if (is_checked)
    {
        sadd.style.display = "none";
    }
    else
    {
        sadd.style.display = "block";
    }
}