body {
	margin:0 auto;
	background-color:#ffffff;
}
#splash {
	position:absolute;
	top: 50%;
	left: 50%;
	width:800px;
	height:600px;
	margin-top: -300px; /*set to a negative number 1/2 of your height*/
	margin-left: -400px; /*set to a negative number 1/2 of your width*/
}