div#s1 {
  width: 200px;          /* menu width */
}

div#s1 ul {
  background-color: #036;
  list-style-type: none; /* get rid of the bullets */
  padding:0;             /* no padding */
  margin:0;              /* no margin for IE either */
}

div#s1 ul li {
  margin: 0;
  padding: 0;
  background-color: #036;
  display:block;
  border-top: 1px solid white; /* lines */
}

div#s1 ul li a {
  display: block;         /* lines extend to right, make area clickable */
  color: white;
  background-color: #036;
  padding: 3px 3px 3px 23px;
  margin:0;
  text-decoration: none;
  height:15px;           /* hint for IE, alternatively remove whitespace from HTML */ 
}

div#s1 ul ul li a {
  margin-left: 20px;     /* indent level 1 */
}

div#s1 ul ul ul li a {
  margin-left: 40px;     /* indent level 2 */
}

div#s1 ul li a:hover {
  color: red;
  background-color: #06C; /* rollover effect */
}