Shoutbox

If i have this:

code:

---

            </Control>
            <Control xsi:type="EditControl" Id="StupidTextBox">
                <Position Top="15" Left="10" Width="200"/>
                <Caption>test</Caption>

            </Control>

---

How can i disable is it?

And is hij have text in a var like this:

code:

---

var text = "Random code: + Math.Random();

---

how can i set it in that StupidTextbox?

So my questions are:
How can i disable StupidTextBox?
How can i set a var from a script in StupidTextBox?

Thnx, PaulE