a:link {
  color: #000000; 
  text-decoration: none; }
a:visited {
  color: #000000; 
  text-decoration: none; }
a:hover { /*this effect is not shown in NN4.xx*/
  color: #000066; 
  text-decoration: underline; }
a:active {/*colour in NN4.xx is red*/ 
  color: #0000000; 
  text-decoration: underline; }