body {
	margin-left:300px;
	margin-right:100px;
	margin-top:50px;
	}
	
.header_box {
	width:700px;
	text-align:center;
	background-color:#cccccc;
	border:1px solid black;
	margin:5px;
	padding:10px;
	}

.content_box {
	width:700px;
	padding:10px;
	text-align:left;
	border:1px solid black;
	margin:5px;
	}
	
.footer_box {
	width:700px;
	text-align:left;
	font-size:80%;
	border:1px solid black;
	margin:5px;
	padding:10px;
	}
	
.nav_box {
	width:175px;
	padding:0px;
	text-align:left;
	position:fixed;
	top:170px;
	left:75px;
	}
	
a.nav_link{
	display:block;
	}

a.nav_link:hover,a.nav_link:active{
	background-color:#999999;
	}
li.nav_link{
	background-color:#CCCCCC;
	margin:5px;
	list-style-type:none;
	padding:0px;
	}
ul.nav_list{
	line-height:150%;
	}
	
a:hover{
	
	}
	
a:active{
	
	}
	
a:visited{
	
	}