#blockHeaderLeft, #blockFooterLeft{
  width:30px;
  float:left; 
}
#blockHeaderLeft{
  background: url("../Images/Bloc/arrondiGaucheHaut.png") no-repeat;
  height:23px;
}
#blockFooterLeft{
  background: url("../Images/Bloc/arrondiGaucheBas.png") no-repeat;
  height:30px;
}
#blockHeaderRight, #blockFooterRight{
  width:30px;
  display:inline;
  float:right;
  float:left;
}
#blockHeaderRight {
  background: url("../Images/Bloc/arrondiDroiteHaut.png") no-repeat;
  height:23px;
}
#blockFooterRight{
  background: url("../Images/Bloc/arrondiDroiteBas.png") no-repeat;  
  height:30px;
}