.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:#ffffff;cursor:pointer;border:1px solid darkblue;}
.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:0px;}
.BackToTop{display:none;opacity:1;position:fixed;z-index:999;}
.selected_file{background:#ffffff;border:1px solid darkblue;}