Expanding Button Help

Hello, I’m very new to Flash and I want to create 4 buttons which when clicked on will expand into the URL that is assigned to them. For example if you click on a button it will expand, pushing the other buttons aside without loading a new page. The url assigned to the expanded button will then appear inside it. Does anyone have any ideas on how I can go about with this? I’d appreciate any tutorials so I can attempt to do it myself.

Thanks in advance =)