function  option() {
 var checked = document.Formular.Bestellung.value
 var justin = "justin"
 var dinner = "dinner"
 var tshirt = "tshirt"
 var gshirt = "gshirt"
 var tanga = "tanga"
switch (checked) {
  case "justin":
getElement("id", "sjustin").style.visibility = "visible";
getElement("id", "sdinner").style.visibility = "hidden";
getElement("id", "stshirt").style.visibility = "hidden";
getElement("id", "sgshirt").style.visibility = "hidden";
getElement("id", "stanga").style.visibility = "hidden";
    break;
  case "dinner":
getElement("id", "sdinner").style.visibility = "visible";
getElement("id", "sjustin").style.visibility = "hidden";
getElement("id", "stshirt").style.visibility = "hidden";
getElement("id", "sgshirt").style.visibility = "hidden";
getElement("id", "stanga").style.visibility = "hidden";
    break;
  case "tshirt":
getElement("id", "stshirt").style.visibility = "visible";
getElement("id", "sdinner").style.visibility = "hidden";
getElement("id", "sjustin").style.visibility = "hidden";
getElement("id", "sgshirt").style.visibility = "hidden";
getElement("id", "stanga").style.visibility = "hidden";
    break;
  case "gshirt":
getElement("id", "sgshirt").style.visibility = "visible";
getElement("id", "sdinner").style.visibility = "hidden";
getElement("id", "stshirt").style.visibility = "hidden";
getElement("id", "sjustin").style.visibility = "hidden";
getElement("id", "stanga").style.visibility = "hidden";
    break;
  case "tanga":
getElement("id", "stanga").style.visibility = "visible";
getElement("id", "sdinner").style.visibility = "hidden";
getElement("id", "stshirt").style.visibility = "hidden";
getElement("id", "sgshirt").style.visibility = "hidden";
getElement("id", "sjustin").style.visibility = "hidden";
    break;
  default:
getElement("id", "stanga").style.visibility = "hidden";
getElement("id", "sdinner").style.visibility = "hidden";
getElement("id", "stshirt").style.visibility = "hidden";
getElement("id", "sgshirt").style.visibility = "hidden";
getElement("id", "sjustin").style.visibility = "hidden";
    break;
  }
}