hi
i think some sort of embed would help you to do that..
i'm not saying that this EXACTLY piece of code would work, but it is one of the ways:
<html><head><title>playing sounds</title>
<script language="JavaScript">
<!--
var MUSICstop=false;
function PLAY_STOPsnd(_sndObj) {
var method = "", sndObj = eval(document.embeds(_sndObj));
if (sndObj != null) { method =(!MUSICstop)?"play":"stop"; }
MUSICstop=(!MUSICstop)?true:false;
if (method) eval(_sndObj+"."+method+"()"

;
}
//-->
</script>
</head>
<body bgcolor="#FFFFFF" onclick="PLAY_STOPsnd('document.trr900')">
<EMBED NAME='trr900' SRC='../../../bla.wav' LOOP=true
AUTOSTART=false MASTERSOUND HIDDEN=true WIDTH=0 HEIGHT=0>
</EMBED>
</body>
</html>
Victor