.conteneur {
   width: auto;
   margin: 0 auto;
   font-family: Verdana, Arial, Helvetica, sans-serif;
   font-size: 13px
border: 1px;
}
#msg_erreur {
   display: none;
   color: #666
border: 1px;
}
input {
   border: 1px solid #ccc;
   color: #666;
   padding: 4px
}
input.focus {
   border: 1px solid #666;
   color: #666
}
.erreur {
   color: #666
    border: 3px red dashed;
width: auto;
}