#centre {
background-color:#ccc;
margin-right: 293px;
margin-left: 450px;
height:850px;
background-image:url('../images/centre.gif');
background-repeat: repeat-y;
}

#gauche {
float:left;
width: 450px;
background-color:#000;
color:#fff;
min-height:400px;
background-image:url('../images/4.gif');
background-repeat: repeat;
/*border-right:1px dashed #ffffff;*/
}

#droite {
float:right;
width: 293px;
background-image:url('../images/4.gif');
background-repeat: repeat;
color:#fff;
min-height:400px;
text-align:center;
}