#scrollTopBtn {
	position: fixed;
	bottom: 20px;
	left:20px;
	padding: 10px 15px;
	font-size:15px;
	background:#333;
	color:white;
	border:none;
	border-radius: 5px;
	cursor:pointer;
	display:none;
	z-index: 999999;
}
#scrollTopBtn:hover {
	background: #555;
}