#nav, #nav ul {
  padding: 4;
  margin:  0 ;
  list-style: none;  

}

#nav a {
  display: block;
  width: 10em;

}

#nav li {
  float: left;
  width: 10em;
}

#nav li ul {
  position: absolute;
  width: 10em;
  left: -999em;
}

#nav li:hover ul, #nav li.sfhover ul {
  left: auto;
  background-color: #5555ff;
}