html, body{margin:0;
padding:auto;
width:100%;
height:100%;
background:#333333;
}


#gauche{
position:relative;
float:left;
height:564px;
width:20px;
background:url(degradeg.png);
}
	
#conteneur {
     position:absolute;
     left: 50%; 
     top: 50%;
     width: 840px;
     height: 564px;
     margin-top: -282px; 
     margin-left: -420px; 

     }
	 
	 #centre{
width:800px;
height:100%;
position:relative;
float:left;
}

#droite{
position:relative;
float:left;
height:564px;
width:20px;
background:url(degraded.png);
}

div#contact
{
	width:800px;
	height:20px;
	text-align:center;
	position:relative;
	float:left;
	margin:auto;
}