var son1, son2, navi;
agent=navigator.userAgent.toLowerCase();      

if ((a=agent.indexOf("msie")) !=-1) {son1="<bgsound src=musiques/"; son2=">";}
else {son1="<object type=audio/mpeg width=0 height=0 data=musiques/"; son2=" <param name=autostart value=true /></object>";}