Destroy objects depending on others

Hi, This forum has been great help with the other questions I have asked, so after some searching I have decided to ask another question.

If I have a mechanic similar to how puzzle bobble works, how do I make dependent chains fall off when their only connection to the roof has been destroyed?

<img src="http://i.imgur.com/FUMKlrG.png" border="0" />

Here is the capx I have been toying around with.

docs.google.com/file/d/0B-YaB0xL6KK2TWU4Q2hsUzdUSGM/edit

I have the balls able to destroy when three touch now, but If I were to destroy three that were touching, and there is others connected to their bottom, they will remain, how do I make them fall or destroy?

Thanks for any help. If it doesnt make sense, ask me any questions and ill explain more about what I am trying to do.

I have been trying at this since yesterday and can't seem to sort it out. Anyone with advice would be greatly appreciated :)

Thanks.

Have a look here for one solution:

http://www.scirra.com/FORUM/bubble-shooter-ball-colisions-placement_topic62091_post381423.html#381423

Basically i used a instance variable for each bubble that tells is it's connected or not. If a bubble touches the top of the layout or another bubble that is connected then it is connected.

I am just heading to lunch, but I quickly downloaded your file to take a look. Based on the quick glance and your comments this sounds to be exactly what I was looking for. I will let you know how it works out when I get back home and try to incorporate it. Thanks for the help.

Ok, so I walked through your code step by step to build it into my program. The mouse clicking seems to work exactly as it does in yours, but for some reason I cant get the clean group to activate upon a specific ball being destroyed. I am working on it at the moment. I just wanted to let you know that you have definitely been very helpful. Thanks again.