How to Load Random MP3's

I am making this small site just for friends to check out what I’m listening to and vice versa.

Basically I need to know how to load a random mp3 on the load of a movie.

Here is the site right now:

I just want a random mp3 from a list of songs to load every time the site is refreshed.

Thanks, for any help. BTW, the paint strokes in the background were from .

Thanks for the help,