a:link {
  font-family: Arial,Helvetica,sans-serif;
  color: black;
  text-decoration: none;
}
a:hover {
  font-family: Arial,Helvetica,sans-serif;
  color: red;
  background-color: yellow
}
a:active {
  font-family: Arial,Helvetica,sans-serif;
  color: yellow;
  text-decoration: none;
}