.conteneur{
    width:700px;
    height:800px;
    margin: auto;
   /* border:1px solid;
    background:url(siteconstruction.jpg) no-repeat top;*/
}
.entete{
    width:700px;
    height:187px;
    margin: auto;
    border:1px solid;
   /* background:url(siteconstruction.jpg) no-repeat top;*/
}
.logo{
    width:185px;
    height:187px;
   float: left;
   /* border:1px solid;*/
    background:url(logo.jpg) no-repeat top;
}
.pan{
    width:400px;
    height:150px;
   float: left;
   text-align: right; color: #3496CB;
}
.cadre{
    width:542px;
    height: 360px;
    margin: auto;
   /* border:1px solid;*/
    background:url(siteconstruction.jpg) no-repeat top;
}