Widget:ToggleFolioNumbers

<script> (function() {

 var folios = document.querySelectorAll('span.folio-number');
 if (!folios.length) return;

 var container = document.querySelector('#Tibetan_Text > div.oo-ui-widget');
 if (!container) return;

 var visible = false;
 var link = document.createElement('a');
 link.href = '#';
 link.textContent = 'Show folio numbers';

 link.onclick = function(e) {
   e.preventDefault();
   visible = !visible;
   for (var i = 0; i < folios.length; i++) {
     folios[i].style.display = visible ?  : 'none';
   }
   link.textContent = visible ? 'Hide folio numbers' : 'Show folio numbers';
 };

 for (var i = 0; i < folios.length; i++) {
   folios[i].style.display = 'none';
 }

 var div = document.createElement('div');
 div.style.textAlign = 'right';
 div.appendChild(link);
 container.insertBefore(div, container.firstChild);

})(); </script>