i am at lost on validating this code.. any tips? i would like it to attachMovie if the user hasnt selected 1 radio from each category.

http://www.scottlindsey.com/elf/scene.htm

Code:
head.attachMovie("head00", "head", 0);
body.attachMovie("body00", "body", 0);
legs.attachMovie("legs00", "legs", 0);
style.attachMovie("style00", "style", 0);

go_btn.onRelease = function ()
{
	if (headGroup.selectedData != undefined) head.attachMovie(headGroup.selectedData, "head", 0);
	if (bodyGroup.selectedData != undefined) body.attachMovie(bodyGroup.selectedData, "body", 0);
	if (styleGroup.selectedData != undefined) style.attachMovie(styleGroup.selectedData, "style", 0);
	play();
	
}