div#menu {
  width: 210px;
  list-style-type: none;
  margin: 3px;
  padding: 260px 0px 30px;
  border: 0;
  position: absolute;
  left: 0px;
  z-index:10;
  font-family: Arial, Helvetica, sans-serif;
  font-size: small;
}

div#menu a {
  color:#000000
  }

div#menu ul {
  padding: 0px;
  width: 190px;
  border:1px solid;
  margin:0px;
  background: white;
  }

div#menu li:hover {
  background: #EDD
  }
div#menu li.sousmenu:hover {
  background: #EBB;
  }

/* Rajout d'une petite fleche pour les sous menu */
div#menu li.sousmenu {
  background: url(image/menu/fleche.jpg) 95% 50% no-repeat;
  }

div#menu ul li {
  position:relative;
  list-style: none;
  border-bottom:1px solid;
  }

div#menu ul ul {
  position: absolute;
  top: -1px;
  left: 190px;
  display:none;
  }

div#menu li a {
  text-decoration: none;
  padding: 4px 0 4px 8px;
  display:block;
  border-left: 8px  solid #BBB;
  width:180px;
  }

div#menu ul.niveau1 li.sousmenu:hover ul.niveau2,
div#menu ul.niveau2 li.sousmenu:hover ul.niveau3 {
  display:block;
}

/* la couleur de la bordure de chaque menu*/
div#menu li a:hover {
  border-left-color: red;
  }

div#menu ul ul li a:hover {
  border-left-color: blue;
  }

div#menu ul ul ul li a:hover {
  border-left-color: green;
  }