How where these buttons done?

[FONT=Arial][COLOR=#494920]i found this website with a really cool menu at the top which i would like to create but i dont know where to start any one have any ideas or know of any simlar tutorials? [/COLOR][/FONT]

[FONT=Arial][COLOR=#494920]i think its some kinda of animation done by action script i think can anyone help me?[/COLOR][/FONT]


[FONT=Arial][COLOR=#494920]Thanks Martin [/COLOR][/FONT]