#btt {
	position:fixed;
	bottom:20px;
	bottom:1.42857143rem;
	right:20px;
	right:1.42857143rem;
	width:40px;
	height:40px;
	background:transparent url(../img/icon-top.png) 0 0 no-repeat;
	text-indent:-9999px;
	z-index:9999;
	outline:none;
}
#btt:hover {
	background-position:0 -40px;
}