How to create fillable PDF with dynamic content dropdowns?

Question

I'm creating a March Madness bracket for people that don't really understand how they work.  What I'd like to do is have dropdowns for each of bracket lines (they would list the teams playing against each other for that game and they would select who they think would win).  I would then like the dropdown for the next game to auto-populate with only the two options for the next round. 
For example, team A and team B play against each other and teams C and D play against each other.  There are two separate dropdowns, one with A and B as choices and the other with C and D as choices.  The user thinks A and C will win their games, so the next dropdown would only have the options of selecting A and C.  To illustrate:
AA and B are listed in the dropdown, and the user selects A to win.
BA or C are listed in the dropdown because the user has selected A and C to win their previous games.
CC and D are listed in the dropdown, and the user selects C to win.
D
I can make the first round dropdowns just fine, but I'm not sure how to conditionally/dynamically populate the second round dropdowns based off of user selections.

Answer 1

I don't understand your request but my english is not the best.
But here you can see a script. You can copy this in the first dropdown in the exit-event.
In this example you will give the first dropdwon the entries
"123"
"345"
"678"
The first case describes what happens when the user clicks "123" the second drowdown will get the entries "456" and "789".
When the user clicks "456" the second drowdown will get the entries "123" and "789".
I think you can adapt this script as you need.
Hope I could help a little bit,
Mandy
switch (xfa.event.newText)
    case "123":
        DropdownListe2.clearItems();
        DropdownListe2.addItem("Please select a value");
        DropdownListe2.addItem("456");
        DropdownListe2.addItem("789");
        DropdownListe2.selectedIndex = 0;
        break;
    case "456":
        DropdownListe2.clearItems();
        DropdownListe2.addItem("Please select a value");
        DropdownListe2.addItem("123");
        DropdownListe2.addItem("789");
        DropdownListe2.selectedIndex = 0;
        break;
    case "789":
        DropdownListe2.clearItems();
        DropdownListe2.addItem("Please select a value");
        DropdownListe2.addItem("123");
        DropdownListe2.addItem("456");
        DropdownListe2.selectedIndex = 0;
        break;
    default:
        break;