#kurukuru_background {
    /* 領域の位置やサイズに関する設定 */
    width: 100%;
    height: 100%;
    z-index: 9998;
    position: fixed;
    top: 0;
    left: 0;

    /* 背景関連の設定 */
    background-color: #000000;
    filter: alpha(opacity=50);
    -moz-opacity: 0.5;
    -khtml-opacity: 0.5;
    opacity: 0.5;
    /* background-image: url(/img/kurukuru-56d7af97c3ba7af0b52b0493d314936e.gif);
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed; */
}

#kurukuru_img {
  position: absolute;
  top: 0px;
  right: 0px;
  bottom: 0px;
  left: 0px;
  margin: auto;
  z-index: 9999;
}