function GetTrinary(message, option1, option2, option3) {
 Dialog.create("Three Doors");
 options = newArray(option1, option2, option3);
 Dialog.addChoice(message, options, option1);
 Dialog.show();
 return Dialog.getChoice();
}

answer = GetTrinary("Do you like green eggs and ham?", "yes", "no",
"sometimes");
print("You said: " + answer);