function cardSwap( string ){
  var opt_key = string.selectedIndex;
  var ccimage = string.options[opt_key].value;
  document.creditcard.src="/secure/images/" + ccimage + ".jpg";
  return true;
}

function vanish() {

  if ((navigator.userAgent.indexOf("Safari")!=-1)){
     return true;
  } else {
     var sbutton = document.getElementById('sbutton');
     var msg = document.getElementById('msg');
     sbutton.style.display = 'none';
     msg.style.display = 'inline';
     return true;
  }
}