/* CSS Document */
BODY{
	background-image:url(images/sf.jpg);
	background-repeat:no-repeat;
	background-position:center;
	background-position:top;
	
}

#centrale{


background-color:#000000;
top:47%;
left:0px;
right:0px;
height:500px;
border: #000 1px solid;
margin-top: -250px; 

position:absolute;



}