#menu a {
  display: inline-block;
  height: 26px;
  width: 120px;
}
#menu a:hover {
  background-color: #ccc;
}
#menu a span {
  display: none;
}
a#navigation-link-1 {
  background: transparent url('../images/navigation/link1.png') 0 0 no-repeat;
}
a#navigation-link-1:hover {
  background: transparent url('../images/navigation/link1hover.png') 0 0 no-repeat;
}
a#navigation-link-2 {
  background: transparent url('../images/navigation/link2.png') 0 0 no-repeat;
}
a#navigation-link-2:hover {
  background: transparent url('../images/navigation/link2hover.png') 0 0 no-repeat;
}
a#navigation-link-3 {
  background: transparent url('../images/navigation/link3.png') 0 0 no-repeat;
}
a#navigation-link-3:hover {
  background: transparent url('../images/navigation/link3hover.png') 0 0 no-repeat;
}
a#navigation-link-4 {
  background: transparent url('../images/navigation/link4.png') 0 0 no-repeat;
}
a#navigation-link-4:hover {
  background: transparent url('../images/navigation/link4hover.png') 0 0 no-repeat;
}