function switchmusic()
{
	s=top.footer.location.toString();
	if (s.indexOf('footer_music.php')!=-1)
	{
	top.footer.location.replace('footer_nomusic.php');
	alert('music_off');
	}
	if(s.indexOf('footer_nomusic.php')!=-1)
	{
		top.footer.location.replace('footer_music.php');
		alert('music_on');
	}
}