Pop-Out Music Player for Free?

Hello,

I am trying to find a free way to have a music player on my site that allows people to keep listening to the song even if they go to another page on my site.

For example, if someone plays a song from my Listen page, they have to remain on that page to keep listening to the song. I would like them to be able to leave the Listen page to visit any other page without the music stopping.

Any ideas? Either a pop-up or a small bar on the bottom of the page. Have seen these on other sites.

Thanks,

Sam