div#menu ul
{
  width: 650px;
  height: 30px;
  margin-left: 20px;
}

div#menu ul li
{
  display: block;
  float: left;
}

div#menu ul li a
{
  display: block;
  width: 120px;
  line-height: 30px;
  padding: 0 5px;
  color: black;
  font-size: 16px;
  font-weight: bold;
  text-decoration: none;
  text-align: center;
  background: transparent url(images/button.png) no-repeat;
}

div#menu ul li a:hover
{
  color: white;
  background: transparent url(images/button-hover.png) no-repeat;
}