Here is the standard little JAVA script that figures out whether you are using Netscape or Internet Explorer. Be careful about your choice of selection.
Music means different things to different people.
What you consider a nice happy tune, may be the song somebody heard while their spouse asked for a divorce or something. Make sure you keep the document.writeln all in one piece. It is a long line, but do not split the line. Test with Netscape. Get yourself a MIDI file that you like.