.flex-direction-nav a {
	width: 70px;
	height: 70px;
	line-height: 99em;
	overflow: hidden;
	margin: -35px 0 0;
	display: block;
	background:url(../images/ad_ctr.png) no-repeat;
	position: absolute;
	top: 50%;
	z-index: 10;
	cursor: pointer;
	opacity: 0.5;
	filter: alpha(opacity=50);
	-webkit-transition: all .3s ease;
	border-radius: 35px;
}

.flex-direction-nav .flex-next {
	background-position: 0 -70px;
	right: 100px;
}

.flex-direction-nav .flex-prev {
	left: 100px;
}

.flexslider:hover .flex-next {
	opacity: 0.8;
	filter: alpha(opacity=25);
}

.flexslider:hover .flex-prev {
	opacity: 0.8;
	filter: alpha(opacity=25);
}

.flexslider:hover .flex-next:hover,
.flexslider:hover .flex-prev:hover {
	opacity: 1;
	filter: alpha(opacity=50);
}