/* 全体の設定 */

body { background-image:url("background.gif");
      margin:1em;
      line-height:1.3em}
h1 { font: bolder x-large sans-serif ;color:green }
h2 { font: bolder large serif; }
h3 { font: bolder medium sans-serif; }

/* ナビゲーションバーの設定 */
.menu{margin:0.5em;
     border-collapse:separate;
     border-spacing:10px;
     background-color:olive;
    width:90%}
.menusub{margin-left:10%;
     border-collapse:separate;
     border-spacing:10px;
     background-color:olive;
    width:60%}
.menutr {border-color:blue;
    height:2em;
    vertical-align:middle;
    }
.menutd {text-align:center;
    background-color:gold;
    width:20%;
    font:bold medium sans-serif;}
.menuhere {text-align:center;
    background-color:yellow;
    width:20%;
    font:bold medium sans-serif;
    color:silver}
.menuat{text-align:center;
    background-color:#ffff99;
    width:20%;
    font:bold medium sans-serif;
    color:silver}
/*ボタンの枠線を表示しない*/
img{border:none}