#container {
  position: relative;
}

#menu {
  position: absolute;
  top: 0;
  right: 0;
}

#menu, #menu ul {
  padding: 0;
  margin: 0;
  list-style: none;
}

#menu li {
  float: left;
  background: #FFF;
}

#menu a {
  display: block;
  padding: 5px;
  width: 130px;
}

#menu li ul {
  position: absolute;
  left: -999em;
  width: 140px;
}

#menu li:hover ul, #menu li ul:hover {
  left:auto;
}