Linking in Flash CS3?

Im doing a storybook flash animation for cl and I can't seem to get the hang of action script. I have a on I made. And it is a on. and I want it that when you click the on, it will go to another movie clip. Inside the same screen and its in the same folder in flash. Could someone give me the action script or help me understand. It is my midterm and its due tomorrow morning. Thank you.