.ir_arriba{
	border-radius: 25px 25px 25px 25px;
	-moz-border-radius: 25px 25px 25px 25px;
	-webkit-border-radius: 25px 25px 25px 25px;
	border: 0px solid #6BBBD6;

	display:inline-block;
	display:none;
	padding:15px;
	background:#333333;
	font-size:20px;
	color:#FFF;
	cursor:pointer;
	position:fixed;
	bottom:80px;
	right:20px;
	
		
}