body {
	font-family: Arial, Helvetica, sans-serif;
	color: #666;
	background-image: url(images/Achtergrond.jpg);
	background-color: #000;
	z-index: auto;
}

td {
	font-family: Arial, Helvetica, sans-serif;
}

th {
	font-family: Arial, Helvetica, sans-serif;
}
#container {
	background-color: #FFFFFF;
	height: 590px;
	width: 850px;
	margin-top: 6px;
	margin-right: auto;
	margin-left: auto;
	position: relative;
}
<div align="center" class="style13">