BODY {
	FONT-SIZE: 13px; 
}
.syou{
	display:block;
	width:40px;
	height:25px;
	background:url(syou_active.jpg) no-repeat;
	overflow:hidden;
	text-indent: 10em;
}
a:hover.syou{
	background:url(syou_active.jpg) no-repeat;
}
.tyuu{
	display:block;
	width:40px;
	height:25px;
	background:url(tyuu.jpg) no-repeat;
	overflow:hidden;
	text-indent: 10em;
}
a:hover.tyuu{
	background:url(tyuu_active.jpg) no-repeat;
}
.dai{
	display:block;
	width:40px;
	height:25px;
	background:url(dai.jpg) no-repeat;
	overflow:hidden;
	text-indent: 10em;
}
a:hover.dai{
	background:url(dai_active.jpg) no-repeat;
}