<script language="javascript">

<!-- abaixo vc coloca a musica -->
var aMidi = new Array();
aMidi[0] = "musica1.mid";
aMidi[1] = "musica2.mid";
aMidi[2] = "musica3.mid";

var MostraDesc = 1;
<!-- abaixo vc coloca o nome da musica -->
var aMidiDesc = new Array();
aMidiDesc[0] = "musica1";
aMidiDesc[1] = "musica2.mid";
aMidiDesc[2] = "musica3.mid";


var howMany = aMidi.length;

function rndnumber(){
var randscript = -1;
while (randscript < 0 || randscript > howMany || isNaN(randscript))
{
randscript = parseInt(Math.random()*(howMany));
}
return randscript;
}

i = rndnumber();

sMidi = "<bgsound src='" + aMidi[i] + " ' loop='infinite'>";
document.write(sMidi);

if (MostraDesc == 1) {
sMidiDesc = "Voc est ouvindo " + aMidiDesc[i];
document.write(sMidiDesc);
}

// --> 
</script> 