*{
  padding: 0px;
  margin: 0px;
}
BODY{
  color : black;
  background-color : white;
  text-align : center;
  background-image : url(../img/bg.gif);
  background-repeat : repeat;
}
HR{
    display:none;
}
BLOCKQUOTE{
    margin: 0px 0px 5px 30px;
    line-height: 1.2em;
    color: gray;
}
P IMG{
    border-style:none;
    border-width:0px;
}
P IMG.right{
  float : right;
  padding: 0px 0px 10px 10px;
}
P IMG.left{
  float : left;
  padding: 0px 10px 10px 0px;
}
#layout{
  padding: 0px;
  text-align: left;
  background-color: white;
  border: 1px solid gray;
  font-size: 14px;
  line-height: 1.3em;
  margin-left:auto;
  margin-right:auto;
  margin-top:5px;
  margin-bottom:5px;
  background-repeat:repeat-y;
  background-position:left;
  width: 802px;
  voice-family: "\"}\"";
  voice-family: inherit;
  width: 800px;
}
<!-- コメントここから -->
html>body #layout{
    width: 800px;
}
#header{
  text-align : center;
  background-color : white;
}
#header H1, #header H2{
	position: absolute;
	font-size: 1px;
	line-height: 0px;
	top: 0px;
	left: 0px;
	color: white;
}
#rightside{
  float: right;
  width : 630px;
  padding: 0px;
  margin: 0px;
  border-left: 1px solid white;
}
#rightside #poster{
	float: right;
	margin-top: 10px;
	padding: 0px;
}
#mainpanel{
  float: left;
  width : 610px; 
  padding: 0px;
  margin: 0px 0px 5px 0px;
  border-left: 1px solid white;
}
#mainpanel UL{
  float: right;
  margin: 50px 15px 120px;
  padding: 0px;
  font-size: 20px;
  width: 220px;
}
#mainpanel LI{
  list-style-type : none;
  margin-bottom : 15px;
}

#contents H1{
 	font-size : 24px;
	letter-spacing: 2px;
 	color : #333;
 	text-align : left;
	padding: 20px;
	margin-bottom: 20px;
	line-height: 40px;
	background: url(../img/dt_bg_none.png) no-repeat; 
}
#contents H2{
    font-size: 16px;
	font-weight: normal;
	line-height: 22px;
	background-color: #ddd;
	border-bottom: 2px solid #ccc;
	padding-left: 20px;
	margin: 20px 0px 15px 0px;
}
#contents H3{
  font-size : 16px;
  line-height: 22px;
  color : green;
  font-weight:bold;
  margin: 20px 20px 10px 40px;
  border-left: 7px solid orangered;
  border-bottom: 1px solid silver;
  padding-left: 10px;
}
#contents H4{
  font-size : 16px;
  line-height: 20px;
  color : black;
  font-weight:bold;
  margin: 10px 20px 10px 40px;
}
#contents H5,H6{
  font-size : 13px;
  line-height: 20px;
  color : black;
  font-weight:bold;
  margin: 10px 20px 10px 40px;
}

#contents P{
  line-height : 1.6em;
  font-size : 13px;
  color: #333;
  margin: 0px 20px 10px 40px ;
}
#contents DL{
  margin : 0px 20px 10px 40px;
  line-height: 1.5em;
}
#contents DT{
  color : gray;
  width: 90px;
  float: left;
  padding-left: 20px;
  background:url(../img/list-mark.gif) no-repeat;
}
#contents DD{
  margin-left: 0px;
}
#contents UL{
  margin: 20px 10px 20px 55px;
  font-size: 13px;
  list-style-type : circle;
  }
 #contents OL{
  margin: 20px 10px 20px 55px;
  font-size: 13px;
  list-style-type : decimal;
  }
#contents LI{
  padding-left : 5px;
  margin-bottom : 5px;
  margin-left: 30px;
}
#contents{
	margin:10px 10px 80px 10px;
}
#contents TABLE, TH, TR,TD{
	border: 1px solid white;
	border-spacing: 0px;
	padding: 2px 5px;
}
#contents TABLE{
	margin-left: auto;
	margin-right: auto;
}
#contents TH{
	background-color: #ddd;
}
#contents TD{
	background-color: #eee;
}
#bottom_info{
  text-align: right;
  clear:both;
  font-size: 12px;
  padding: 5px 20px;
 }
#footer{
  text-align: left;
  clear: both;
  color: white;
  background-color: #7A96DF;
  padding: 5px;
  font-size:12px;
}
.menu{
  float: left;
  width: 154px;
  font-size: 13px;
  font-weight:bold;
  text-align: left;
  background-color: white;
  text-decoration: none;
  letter-spacing: 0.3px;
  color: black;
  line-height: 35px;
  padding: 5px 5px 5px 10px;
  margin-top: 5px;
}
.menu P{
  margin : 5px 0px 0px 0px;
}
.menu UL{
  list-style-type : none;
  padding-bottom: 15px;
}
.menu LI{
  border-bottom: 2px solid white;
  background-color: #eee;
}
.menu UL A,.menu UL A:link,.menu UL A:visited{
  display: block;
  background-color: #ddd;
  text-decoration:none;
  color: navy;
  padding-left: 1em;
}
.menu UL A:hover{
  color: white;
  display: block;
  background-color:#7A96DF;
  padding-left: 1em;
}
.photo{
  padding: 4px;
  border: 1px solid gray;
  background-color : white;
}
.timestamp{
  color: gray;
  font-family:Arial;
  font-weight:bold;
}
.author{
  font-size : 14px;
  font-style: bold;
  text-align : right;
  margin : 20px;
}
.zachou{
  font-size : 14px;
  font-style: bold;
  text-align : right;
  margin : 5px 20px;
}
.presenter{
  font-size : 14px;
  font-style: bold;
  text-align : left;
  margin : 20px 20px 8px 140px;
  text-indent: -20px;
}
.affiliation{
  font-size : 14px;
  font-style: bold;
  text-align : left;
  margin : 8px 20px 20px 140px;
}
.wait{
	text-align: center;
	padding: 150px 0px;
}
.graybox {
	font-size: 12px;
	background-color: #f8ffff;
	margin-bottom: 10px;
	padding: 2px;
	border: solid 1px #a1acaf;
	width: 290px;
}
.graybox_header {
	color: black;
	background-color: #a1acaf;
	background-image: url(../img/boxheader.gif);
	text-align: center;
	letter-spacing: 1px;
	padding: 2px;
	font-size: 12px;
	line-height: 1.6em;
}
.graybox P{
	line-height: 1.3em;
	font-size: 12px;
	margin: 10px;
}
.graybox2_header {
	color: white;
	background-color: navy;
	background-image: url(../img/boxheader-blue.gif);
	background-repeat: repeat-x;
	text-align: center;
	letter-spacing: 1px;
	margin-bottom: 0px;
	padding: 2px;
	border-top: 1px solid #ddd;
	border-right: 1px solid #ccc;
	border-left: 1px solid #ccc;
	font-size: 13px;
	line-height: 1.6em;
	width: 290px;
}
.graybox2 {
	font-size: 14px;
	background-color: #FFFFFF;
	margin-top: 0px;
	margin-bottom: 10px;
	padding: 2px;
	border-top: 1px solid #ccc;
	border-left: 1px solid #ccc;
	border-bottom: 1px solid #ccc;
	border-right: 1px solid #ccc;
	width: 290px;
}
.graybox2 P{
	line-height: 1.3em;
	font-size: 12px;
	margin: 10px;
}
.article{
	float: left;
	padding: 5px;
	margin-left: 5px;
}
.article DL{
  margin : 10px 5px;
  line-height : 1.5em;
  font-size: 12px;
}
.article DT{
  color : gray;
  padding-left : 15px;
  margin-bottom : 0px;
  background:url(../img/list-mark.gif) no-repeat;
}
.article DD{
  color: gray;
  padding-left: 15px;
  margin-left: 0px;
  margin-bottom: 5px;
  padding-bottom: 4px;
  border-bottom: 1px gray dotted;
}
.note{
	text-align: left;
	font-size: 16px;
	line-height: 22px;
	color: orangered;
	background: #ffc;
	border: 3px solid lime;
	margin:50px 20px;
	padding: 20px;
}