html, body
{
    height: 100%;
    margin:0;
    padding:0;
}

div {
    position:relative;
    height: 100%;
    width:100%;
}

div iimg {
 max-width:80%;
  height: auto
}


div img {
    position:absolute;
    top:0;
    left:0;
    right:0;
    bottom:0;
    margin:auto;

}