#ams-iframe {
    position: relative;
    min-height: 300px;
    width: 100%;
    visibility: hidden;
    border: 0px;
    background-color: white;
    z-index: 1;
}
#iframe-loader {
    position: absolute;
    top: 250px;
    left: 50%;
    margin: -36px 0 0 -36px;
    width: 72px;
    height: 72px;
    line-height: 1;
    font-size: 72px;
    text-shadow: 0 1px 5px #fff;
    background-color: transparent;
    z-index: 0;
  }