div#s1 {
  width: 250px;          /* menu width */
}

div#s1 ul {
  /*background-color: #fff;*/
  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: #fff;*/
  display:block;
  /*border-top: 1px solid white; *//* lines */
}

div#s1 ul li a {
  display: block;         /* lines extend to right, make area clickable */
  color:#999999;
  /*background-color: #fff;*/
  padding: 3px 3px 3px 3px;
  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 li ul, div#s1 li.open li.closed ul {
  display: block;         /* stond op none voor collapse, heb ik op block gezet om niet te collapsen */
}

div#s1 li.open ul {
  display: block;        /* expand */
}
 
div#s1 ul li.open a {
 /* background-image: url(bullet_open.gif);*/
  background-repeat: no-repeat;
}

div#s1 ul li.closed a {
/*  background-image: url(bullet_closed.gif);*/
  background-repeat: no-repeat;
}

div#s1 ul li.leaf a {
 /* background-image: url(bullet_leaf.gif);*/
  background-repeat: no-repeat;
}
 
div#s1 li.active a {
  background-position: 0px -20px;
  color:#FFFFFF;            /* highlight text */
}
 
div#s1 li.active li a {
  background-position: 0px 0px;
  color:#999999;          /* fix lower levels */
}

div#s1 ul li a:hover {
  color:#FFFFFF;
  /*background-color:#999999;*/ /* rollover effect */
}