#back-to-top{
		position:fixed;
		bottom:30px;
		right:30px;
		z-index:9999;
	}
	/*
	#back-to-top a{
		text-align:center;
		text-decoration:none;
		display:block;
		width:60px;
		-moz-transition:color 1s; 
		-webkit-transition:color 1s;
		-o-transition:color 1s;
	}
	#back-to-top a:hover{
		opacity:0.5;
	}
	*/
	#back-to-top a span{
	display:block;
	height:52px;
	width:50px;
	background:url(images/arrow-up.png) no-repeat center center;
	opacity:0.6;
	-webkit-transition: all 0.5s ease;
	-moz-transition: all 0.5s ease;
	-o-transition: all 0.5s ease;
	-ms-transition: all 0.5s ease;
	transition: all 0.5s ease;
	}
	
	#back-to-top a:hover span{
		background:url(images/arrow-up.png) no-repeat center center;
		opacity: 1;
	}