html{
}

body {
	margin:0;
}

#header{
	width:100%;
	height:100px;
	background:lightBlue;
	float:left;
}

#section{
	width:100%;
	height:500px;
	background:#dcdcdc;
	float:left;
}

#footer{
	width:100%;
	height:100px;
	background:black;
	float:left;
}