var MSIE=navigator.userAgent.indexOf("MSIE");
var NETS=navigator.userAgent.indexOf("Netscape");
var OPER=navigator.userAgent.indexOf("Opera");
if((MSIE>-1) || (OPER>-1)) {
document.write("<BGSOUND SRC=sound.mp3 LOOP=2>");
} else {
document.write("<EMBED SRC=sound.mp3 AUTOSTART=FALSE ");
document.write("HIDDEN=true VOLUME=40 LOOP=2>");
}