.overlay {
	height: 100%;
	width: 100%;
	position: fixed;
	display: none;
	z-index: 10;
	left: 0px;
	top: 0px;
        overflow: hidden;
}
.big_image {text-decoration:none;overflow:visible;}
.big_image img {cursor: pointer; padding: 3px; z-index: 11;}