Use this script to play background music while a page is being viewed.
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<script>
<!--
/*
Background music script
By JavaScript Kit (http://javascriptkit.com)
Over 400+ free scripts here!
*/

//specify FULL path to midi
var musicsrc="http://www.yourdomain.com/allfor.mid"
if (navigator.appName=="Microsoft Internet Explorer")
document.write('<bgsound src='+'"'+musicsrc+'"'+' loop="infinite">')
else 
document.write('<embed src=\"'+musicsrc+'\" hidden="true" border="0" width="20" height="20" autostart="true" loop="true">')
//-->
</script>
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Note, the music is not included. You will have to give the path to the music file when you upload the file.