[Moo] How to make ajax links css :visited

[zipz]

I have links which updates some content when the user click the link.
The problem is that my users complain that the links aren't turning to
the :visited color after they have visited the link. How could I
achieve :visited colors to the clicked ajax links.

Sample code. No jsfiddle needed?

element.addEvent('click:relay(a.ajaxlink)', function(event, element){
  event.stop();
  this.ajaxRequest(element, true); //send request and update content
}.bind(this));