body{
  text-align:center;
}
#div_base{
	text-align:center;
	width:940px;
	margin:0 auto;
}
#div_main{
	float:left;
	width:600px;/* 広告表示は「600px」 */
	text-align:left;
}
#div_naviBtn{
	float:left;
	background-color:#800000;
	width:180px;
}
#div_pr{
	float:left;
	width:150px;
	height:600px;
}
#div_naviBtn ul{
	margin:0px;
	padding:0px;
	list-style-type:none;
}
#div_naviBtn ul li{
	padding:3px;
	border-right:solid 2px #808080;
	border-bottom:solid 2px #808080;
}
#div_naviBtn ul li span{
	cursor:pointer;
	color:#ffffff;
	text-decoration:none;
	display:block;
	padding:3px;
}
#div_naviBtn ul li span a{
	vertical-align:bottom;
	height:25px;
	cursor:pointer;
	color:White;
	text-decoration:none;
	display:block;
}
.a_link{
	cursor:pointer;
	color:Blue;
	text-decoration:none;
	display:block;
}
#div_pr{
	padding:3px;
	border:solid 1px #808080;
}