ul {
  list-style-type: none;
}
#rightMenu {
  position: absolute;
  top: -9999px;
  left: -9999px;
}
#rightMenu ul {
  float: left;
  border: 1px solid #979797;
  background: #f1f1f1 url(http://js.fgm.cc/learn/lesson6/img/line.png) 24px 0
    repeat-y;
  padding: 2px;
  box-shadow: 2px 2px 2px rgba(0, 0, 0, 0.6);
}
#rightMenu ul li {
  float: left;
  clear: both;
  height: 24px;
  cursor: pointer;
  line-height: 24px;
  white-space: nowrap;
  padding: 0 30px;
}
#rightMenu ul li.sub {
  background-repeat: no-repeat;
  background-position: right 9px;
  background-image: url(http://js.fgm.cc/learn/lesson6/img/arrow.png);
}
#rightMenu ul li.active {
  background-color: #f1f3f6;
  border-radius: 3px;
  border: 1px solid #aecff7;
  height: 22px;
  line-height: 22px;
  background-position: right -8px;
  padding: 0 29px;
}
#rightMenu ul ul {
  display: none;
  position: absolute;
}