how to disable movieclip? - actionscript-3

Question

I am using Adobe Flash CS5, Action Script 3.0. I want to disable my movie clip. How to do that?
My code:
var index:Array = ([0,1,2,3]);
var radioGroup1:RadioButtonGroup = new RadioButtonGroup("question1");
rb1.group = radioGroup1;
rb2.group = radioGroup1;
rb3.group = radioGroup1;
rb4.group = radioGroup1;
b1.addEventListener(MouseEvent.CLICK, submitclick,false);
function submitclick(event:MouseEvent):void
{
if (radioGroup1.selectedData == null)
{
b1.mouseEnabled = false;
//ExternalInterface.call("Test","Please selecte one answer");
//return;
} else {
if (radioGroup1.getRadioButtonIndex(radioGroup1.selection) == 2)
{
myscore += 10;
}
}
if (compquest>=maxquest)
{
gotoAndStop(1,"Scene 6");
}
else
{
MovieClip(this.root).gotoAndStop(1, "Scene " + questions[compquest++]);
}
}
I want to disable this b1 movieclip. So anyone could tell me what am I doing wrong?

Answer 1

If, by disable, you mean to make it unclickable and faded like a disabled button. Just reduce the alpha a bit and set its mouseEnabled property to false.
function submitClick(event:MouseEvent){
b1.alpha = .6;
b1.mouseEnabled = false;
}
This way the user will not be able to click it and it appear disabled.

Answer 2

First you could write, because event.target is p1:
function submitclick(event:MouseEvent):void
{
event.target.mouseEnabled = false;
}
On the other hand, the condition you want to evaluate in your if statement is probably false:
radioGroup1.selectedData == null
Therefore the associated code isn't executed:
b1.mouseEnabled = false;
You should test in your function and before your if statement:
trace(radioGroup1.selectedData == null);