#dropdown {
  position:absolute;
  height:30px;
  width:850px;
  margin-top:150px;
  margin-left:315px;
}

#dropdown ul {
  font-family: Arial, Verdana;
  font-size: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

#dropdown ul li {
  display: block;
  position: relative;
  float: left;
}

#dropdown li ul { display: none; }
#dropdown ul li a {
  display: block;
  text-decoration: none;
  color: #ffffff;
  padding: 5px 15px 5px 15px;
  background: #202020;
  margin-left: 1px;
  white-space: nowrap;
}
#dropdown ul li a:hover { background: #252525; }
#dropdown li:hover ul {
  display: block;
  position: absolute;
}
#dropdown li:hover li {
  float: none;
  font-size: 12px;
}
#dropdown li:hover a { background: #202020; }
#dropdown li:hover li a:hover { background: #252525; }