input.bouton1 {
   width: 132px;
   height: 28px;
   margin: 0;
   padding: 0;
   border: 0;
   background: transparent url(bouton.gif) no-repeat top left ;
   cursor: hand;
}
input.bouton1:hover {
   cursor: hand;
}
input.bouton2 {
   width: 132px;
   height: 28px;
   margin: 0;
   padding: 0;
   border: 0;
   background: transparent url(bouton_over.gif) no-repeat top left ;
   cursor: hand;
}
input.bouton2:hover {
   cursor: hand;
}