body
{
  margin: 0;
  padding: 100px 0 0 0;
  color: #000;
  background: #fff;
}
div#menubox
{
  overflow: auto;
  width: 100%;
  position: absolute;
  top: 0;
  left: 0;
  color: #000;
  background: #fff;
}
div#content
{
}

@media screen
{
  body>div#menubox
  {
    position: fixed;
  }
}