Help with radio button selection error

OK. So I have a group of radio buttons on the stage. If the user chooses one of the buttons and hits ‘Submit’ all is fine. If they fail to make a selection I want to show them an error. Using the code below works fine if this happens initially, but if the user makes a selection and hits ‘Submit’ the radGroup.selection is now true. So now if they do not make a selection the next time, when they hit ‘Submit’ it does not catch the error.

So, is there a way to clear this radGroup.selection? Can I just force it to false?


if (! radGroup.selection)