setChildIndex and addChild Problems

Ok, I’m creating a webpage in Flash CS4. The page consists of 9 squares and when you rollover them they disappear to show information. The squares are all movie clips and they play a slideshow. My main information is located on a layer under the movie clips layer, but in one of the information squares I have a link that will not work (I know this is because my movie clip is still there, just at %0 opacity). So I was thinking I could use the setChildIndex or addChild to send the front movie clip behind the information, but I’m not sure how I would go about coding it?

I hope this makes sense and any help is greatly appreciated
Thanks