body {
	font-size:110%;
	line-height:100%;
	}

.font_bk_s {
	margin:0px;
	padding:0px;
	display:inline;
	height:19px;
	background-image: url(http://www.theearthnews.jp/images/font_s_bk.gif);
	background-repeat: no-repeat;
	background-position: left top;
	}

.font_bk_s img {
	visibility: visible;
	height:19px;
	}	
	
.font_bk_m {
	margin:0px;
	padding:0px;
	display:inline;
	height:19px;
	background-image: url(http://www.theearthnews.jp/images/font_m_on.gif);
	background-repeat: no-repeat;
	background-position: left top;
	}	

.font_bk_m img {
	visibility: hidden;
	height:19px;
	}
	
.font_bk_l {
	margin:0px;
	padding:0px;
	display:inline;
	height:19px;
	background-image: url(http://www.theearthnews.jp/images/font_l_bk.gif);
	background-repeat: no-repeat;
	background-position: left top;
	}
	
.font_bk_l img {
	visibility: visible;
	height:19px;
	}