"

From 2010.igem.org

ul#menubar {

  margin: 0px;
  padding: 0px;

} ul#menubar li {

  list-style-type: none;
  float: left; 
  margin: 0.3em 0.1em; 
  border: 1px gray solid; 
  padding: 0px; 

}

ul#menubar li a {

  text-decoration: none;
  display: block;
  padding: 0.3em;

} ul#menubar li a:hover {

  background-color: blue; 
  color: white; 

}