body
{   
   width: 1040px;
   height: 750px;
   margin: auto;
   margin-top: 0px;
   margin-bottom: 0px;
}


#en_tete
{
   width: 640px;
   margin: auto;
   height: 480px;
   background-image: url("paf.gif");
   background-repeat: no-repeat;
}