body{
margin:0px;
padding:0px;
}

#all{
border:0px;
padding:0px;
margin:0px;
}

#contenu{
position:absolute;
margin:0px;
padding:0px;
top: 50%;
width: 100%;
height: 600px;
margin-top: -300px;
}

#left{
background:url(images/left.jpg);
background-repeat:repeat-x;

}

#center{
padding:0px;
margin:0px;
height:600px;
width:800px;
vertical-align:middle;
}

#right{
background:url(images/right.jpg);
background-repeat:repeat-x;
}