How use Select Option in Watson Conversation

I'm trying to insert the select options tag into my conversation, to make it more simple to the user. I did this:

And in the index.js:

function selected(){
switch($('#selected option:selected').val()){
    case 01:
       alert("01");
        break;
    case 02:
        alert("02");
        break;
}
};

But it doesn't recognize the option selected. I tried without the function selected() (only with switch case), but it didn't worked.. Can somebody help me please? Thanks a lot!

via barbs