.ttl2{
	font-weight:bold;
	text-align:center;
}
#osyokuji{
	background: rgba(0, 0, 0, 0) url("../img/img_index/bk_nav.jpg") no-repeat scroll center center;
}
#public{
	background: rgba(0, 0, 0, 0) url("../img/img_index/bk_nav.jpg") no-repeat scroll center center;
}