function showRefDiv() {
 if ( document.getElementById('divInsightRef') ) {
  var divRef = document.getElementById('divInsightRef');
  var aRef = document.getElementById('aInsightRef');
  if (divRef.style.display == 'none') {
   divRef.style.display = 'block';
   aRef.firstChild.replaceNode(document.createTextNode('hide references'));
  } else {
   divRef.style.display = 'none';
   aRef.firstChild.replaceNode(document.createTextNode('show references'));
  }
 }
}