var mp3 = null;
function open_mp3() {
	if(mp3 == null || mp3.closed) {
		mp3 = window.open("mp3.php", "mp3", "height=200,width=400,status=yes,toolbar=no,menubar=no,location=no,resizable=no");
	}
	else {
		mp3.focus();
	}
}