#page { width: 800px; }
#header {
width: 810px;
background: #FFFFFF;
height: 100px;
}
#contentsarea {
	width:550px;
	background: #ffffff;
	height: 900px;
	float: left;
}
#sidenavi {
	width: 220px;
	background: #ffffff;
	height: 350px;
	float: right;
}
#footer {
width: 800px;
background: #ffffff;
height: 30px;
clear: both;
}