My first question would be, why do you want music on your site? Is this for a client that wants it?
I ask this because there are some issues when adding music to a website. Namely, visitors don't like it. There are few things that make me click the back button faster than unexpected blaring music from my speakers. If the visitor wants to hear music, they're probably already playing their own music in iTunes or on their stereo. It is very annoying to hear two different songs playing at the same time.
There are also technical issues. Mostly, the embed and object tags that work in some browsers tend to not work in other browsers. The code would likely require the user to have certain browser plugins as well, which are sometimes forbidden in offices.
But, if you truly want to add some music that is interrupted while browsing, i recommend using a pop-up. With this method, if they hate the music (and they probably will) they will close the popup rather than closing your site.
Follow the javascript tutorial here:
http://digitalmedia.oreilly.com/2005/02/23/mp3_embed.html
It assumes zero knowledge of javascript.
Good luck,
-Lou
