#diashow {
    height: 30.5em;
    width:58.5em;
    position: relative;
    margin: 28.0em auto 0.8em;
    border: 5px solid #3B83AA;
    box-shadow: 1px 1px 5px 2px #777;
}

#diashow img {
    display: none;
    height: 30.5em;
    width: 58.5em;
   position:absolute;

}

#diashow  {
    display: block;
}