html, body {
    height: 100%;
    background:#000;
    overflow:hidden;
}
.frame {
    width: 100%;
    height: 99%;
    display: table;
    text-align: center;
}
.frame > .center {
    display: table-cell;
    vertical-align: middle;
}

.center img {
	width:500px;
	max-width:80%;
	height:auto;
}