body {font-family : Arial, Helvetica, sans-serif; margin: 0; padding: 0; font-size : 10pt; background-color : #fff;}

 #accueil {
	position:absolute;
	left: 50%;
	top: 50%;
	width: 960px;
	height: 520px;
	margin-top: -260px;
	margin-left: -480px;
	border: 1px #fff solid;
	
}