.eco {
width:338px;
border-left:10px solid #0c6;
border-bottom:1px solid #333;
border-Right:1px solid #333;
font-size:150%;
padding:5px;
padding-left:8px;
padding-top:7px;
background-color:#f5fffa;
 background-image:URL(http://www.pref.tottori.lg.jp/secure/123596/ecoh2back.gif);
 background-repeat:no-repeat;
 background-position:top left;
margin-top:0.3em;
margin-bottom:3px; 
}