Rollover without creating a button

Hi guys!

I would like to know how you can create a roll-over state without having to convert to a button.

Example: I have an image of a building and one of the windows is lit. When the user rolls over the window I want a sound to play. At present the only way I can do this is if I create a button. But I dont want to do that for 2 reasons. 1.) I want the cursor to stay the same as if not rolling over a button. 2.) I dont want to a button as i dont want to link to anything. I just want a roll over.

Please help! Many thanks

Mr Bling!