body{
	margin: 0;
	background: #ffffff;
	}

eader {
	position: absolute;
	left: 0px;
	top: 0px;
	width: 100%;
	height: 50px;
	overflow: none;
	}

#main {
	position: absolute;
	left: 0px;
	top: 50px;
	width: 100%;
	height: 500px;
	overflow: auto;
	}