.navi .default_sound {
	background:url(core/widget/navi/default_sound/bgm.png) no-repeat;
	cursor:pointer;
	opacity:1;
}
.navi .default_sound:hover	{
	opacity:.8;
}
.navi .default_sound a	{
	width:80px;
	height:11px;
	display:block;
}