a.back-to-top {
display: none;
	width: 120px;
	height: 40px;
	text-indent: -9999px;
	position: fixed;
	z-index: 999;
	right: 5%;
	bottom: 10%;
	background: #CCC url("../images/up-arrow.png") no-repeat center 43%;
	-webkit-border-radius: 130px;
	-moz-border-radius: 130px;
	border-radius: 130px;
}
a:hover.back-to-top {
	background-color:  #999;
}