a.back-to-top {
	display: none;
	width: 60px;
	height: 60px;
	text-indent: -9999px;
	position:fixed;
	z-index: 9999;
	right: 20px;
	bottom: 20px;

	background:#0066FF url('../images/up-arrow.png') no-repeat center 43%;
	
	-webkit-border-radius: 30px;
	-moz-border-radius: 30px;
	border-radius: 30px;
}
a:hover.back-to-top {
	background-color: #000;
}