.zengallery_screen{
	background : #000000;
}

.prev, .next{
	background-image : url(../image/stock_left.png);
	background-repeat : no-repeat;
	width : 20px;
	height : 20px;
	display : block;
	float: left;
	cursor : pointer;
	width : 50%;
}
.prev{
	background-position : top right;
	
}
.next{
	background-image : url(../image/stock_right.png);
	width : 40%;
	
}

.prev span, .next span{
	display : none;
}