Flash Help

I don't know where to put this...hope it's in the right place. But can someone that knows flash help me with this? Can you give me the code to put on a button that'll turn a movie clip visible or invisible? Also, what's the code to check if something is visible and go to a certain scene if it is? Hope I make sense. So here's an example: If i click on a button it'll turn movie clip "box" visible. Then if I click on another button it'll check whether or not movie clip "box" is visible and go to a certain scene if it is or dispaly a message if it's not. I a noob with flash script so if you can supply a code I can copy and paste into flash and just edit it to match my instance names that would be great! Thanks in advanced!

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