ActionScript 3.0 :: Disable A Button Click But Still Use RollOver?

I've had this problem numerous times. I want to disable click events for a Button and have the Button appear disabled, but still respond to rollOver/rollOut events.

1. Consider a UI where users can vote for items they are viewing via a "vote" button when viewing an item -- they view one item at a time and there's one vote button on the UI.

2. User clicks "vote" and it sends the vote information to server etc, and stores in the session that the user voted for that item.

3. User can only vote for an item once. So to reflect this, I disable the vote button via Button.enabled = false. This makes the button visually disabled for the user and the user can't click it to vote again.

4. However, I want the user to know why the vote button is disabled, in case they forget they voted for the item and don't intuitively know why the button is disabled. In order to do this, I want rolling over the disabled button to give the user some feedback, like a tooltip that says "You already voted for this item."

5. Because the Button is disabled, I cannot respond to rollOver or mouseOver events.

There are alternative ways to letting the user know why something is disabled, but many times I think a roll over response with a visually disabled button fits the UI situation best. The only solutions I've come with are to check hitTestPoint with the mouse location on mouseMove (nasty) or create an invisible overlay button over the disabled button (also nasty.)