#menu li ul {
  display: none;
  position: absolute; 
  top: 36px;
  left: 0;
  background: #fff;
  border-left: 1px solid #d9d9d9;
  border-right: 1px solid #d9d9d9;
  border-bottom: 1px solid #d9d9d9;
  margin: -10px 0 0 20px;
  }