#back-top {
	position: fixed;
	bottom: 30px;
	left:93%;
	margin-left: -100px;
}

#back-top a {
	width: 70px;
	display: block;
	text-align: center;
	font: 11px/100% Arial, Helvetica, sans-serif;
	font-weight:bold;
	text-transform: uppercase;
	text-decoration: none;
	color: #A6A6A6;
	/* transition */
	-webkit-transition: 1s;
	-moz-transition: 1s;
	transition: 1s;
	filter: alpha(opacity=75); /* internet explorer */
	-khtml-opacity: 0.75;      /* khtml, version anterior de safari */
	-moz-opacity: 0.75;       /* firefox, mozilla, netscape */
	opacity: 0.75;           /* safari, chrome, opera */
	-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=75)"; /*internet explorer 8 - gracias Andres */
}
#back-top a:hover {
	color: #000;
	 filter: alpha(opacity=90); /* internet explorer */
    -khtml-opacity: 0.90;      /* khtml, version anterior de safari */
    -moz-opacity: 0.90;       /* firefox, mozilla, netscape */
    opacity: 0.90;           /* safari, chrome, opera */
       -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=90)"; /*internet explorer 8 - gracias Andres */ 
	
}

/* arrow icon (span tag) */
#back-top span {
	width: 70px;
	height:70px;
	display: block;
	margin-bottom: 7px;
	/*background: #ddd url('up-arrow.png') no-repeat center center;*/

	/* rounded corners */
	-webkit-border-radius: 15px;
	-moz-border-radius: 15px;
	border-radius: 15px;

	/* transition */
	-webkit-transition: 1s;
	-moz-transition: 1s;
	transition: 1s;
}
#back-top a:hover span {
	background-color: #000;
}