html, body {

	margin: 0;

	padding: 0;

	width: 100%;

	height: 100%;

}

#tb {

	width: 100%;

	height: 100%;

}

.td{

	vertical-align: middle;

	text-align: center;

}

.s1 {

	font-size: 1.5em;

	font-family: sans-serif;

	display: block;

	margin-top: -5px;

}