Elastic button effect

hi,
I wanna have the same elastic effect as the buttons of blink182.com. It seems like animated buttons, but there definitely seems to be some actionscript involved, since the button still moves when you rollover a different button. I need help with this.
thanks kirupaville

I think they’re tweened, not scripted. The fact that they still play when rolling over another button doesn’t mean it’s scripted, although there’s probably a very little actionscript involved to have the movieclip play when rolled over. I don’t think they’re buttons.

any other opinions?