gistfile1.js

$('a.showhide-trigger').click(function(){
  $('div.showhide').toggle('slow');
  if ($('a.showhide-trigger').text() == 'Show all archived issues'){
    $('a.showhide-trigger').text('Hide archived issues');
  } else {
    $('a.showhide-trigger').text('Show all archived issues');
  }
});