Always Skip intro - remember w/ cookie

I have a flash file with an intro and with 2 buttons on it. "Skip Intro and Always skip Intro". I need the Always skip button programmed to set a cookie so every time that user comes back they are taken to "Frame 2" (start of main site) instead of "Frame 1" where the intro movie is. The main flash file is all done, I just need this 1 button programmed, I also have the main HTML file ready in case you need to insert Java scripts into that part.