.space100{
	height:100px;
}

.space50{
	height:50px;
}

.space200{
	height:200px;
}

.space150{
	height: 150px;
}

.footer{
	padding:10px 0;
	border-top:1px solid #ccc;
	width:640px;
	text-align:center;
	margin:0 auto;
}