HTML file is:
<html>
<head>
<title>flash page</title>
<script language="JavaScript" type="text/JavaScript">
function OpenBrWindow(theURL,winName,features) { //v2.0
window.open(theURL,winName,features);
}
</script>
</head>
<body><body>
<html>
than add the following to your flash button:
on(press){
getURL(javascript:OpenBrWindow('YOURS.htm','sound','width=300,height=300'));
}