function setMusic(val) {
	if (navigator.appName=="Netscape")
    	xmlhttp_send = new XMLHttpRequest();
	else if (navigator.appName=="Microsoft Internet Explorer")
    	xmlhttp_send = new ActiveXObject("Microsoft.XMLHTTP");

    xmlhttp_send.open("GET","set_music.php?v="+val+"&rand=" + new Date(), true);
	xmlhttp_send.send(null);
}