html, body {
   margin:0px;
   padding:0px;
   background-color: silver;
}



#navigation {
	position:absolute;
	left:10px;
	top:270px;
	width:220px;
	height:500px;
    margin:0px;
    padding:0px;
   margin:0px;
   padding:0px;
;
}
#content {
	position:absolute;
	left:265px;
	top:252px;
	height:500px;
	width:840px;
    margin:0px;
   padding-top:10px;
   padding-left:10px;

}


a.navi, a.navi_first, a.navi_self {
   display:block;
   white-space:nowrap;
   overflow:hidden;
      border-top:1px solid black;

   border-left:1px solid black;
   border-right:1px solid black;
   border-bottom:1px solid black;
   font-family:Tahoma,sans-serif;
   font-size:12px;
   font-weight:bold;
   text-decoration:none;
   letter-spacing:0.1em;
   padding:7px;
   text-align:center;
}

a.navi_first {
   border-top:1px solid black;
}

a.navi:link, a.navi_first:link, 
a.navi:visited, a.navi_first:visited {
   background-color:#silver;
      color:white;
}

a.navi_self:link, a.navi_self:visited {
   background-color:silver;
}

a.navi:hover, a.navi_first:hover, a.navi_self:hover, 
a.navi:active, a.navi_first:active, a.navi_self:active {
   background-color:white;
      color:black;

}