/*
Back to top button 
*/
#back-top {
	position: fixed;
	bottom: 10px;
	margin-left: 20px;
	z-index:9990;
	/*IE6 hack */
		 _position: absolute;
		 _top:expression(documentElement.scrollTop+body.scrollTop);
		 _margin-top: 500px;

}
body { 
	/*IE6 hack */
		_background: url(null) fixed ;
}
#back-top a {
	width: 50px;
	display: block;
	text-align: center;
	font: 11px/100% Arial, Helvetica, sans-serif;
	text-transform: uppercase;
	text-decoration: none;
	color: #bbb;
	/* background color transition */
	-webkit-transition: 1s;
	-moz-transition: 1s;
	transition: 1s;
	
}
#back-top a:hover {
	color: #000;
}
/* arrow icon (span tag) */
#back-top span.icon {
	width: 50px;
	height: 50px;
	display: block;
	margin-bottom: 7px;
	background: #ddd url(up-arrow.png) no-repeat center center;
	/*opacity:0.8;
	filter:alpha(opacity = 100);*/
	/* rounded corners */
	-webkit-border-radius: 8px;
	-moz-border-radius: 8px;
	border-radius: 8px;
	/* background color transition */
	-webkit-transition: 1s;
	-moz-transition: 1s;
	transition: 1s;
}
#back-top a:hover span {
	/*opacity:1;
	filter:alpha(opacity = 100);*/
}