.close_button{position:relative;z-index:2;left:-20px;margin-right:-20px;top:3px;float:left;visibility:hidden}.gallery_block{text-align:center;width:520px}.img_gallery{text-align:center;float:left;width:80px;height:80px;border:1px solid #c4ced2;margin:2px}.img_gallery:hover{background:#fff;cursor:pointer;border:1px solid #00008b}.img_gallery img{display:inline-block;vertical-align:middle;max-width:60px;max-height:60px;margin:auto}.helper{display:inline-block;vertical-align:middle;height:100%;width:0}.BackToTop{display:none;opacity:1;position:fixed;z-index:999}.selected_file{background:#fff;border:1px solid #00008b}