function linkify_nodelet_titles() {
  var nodelet_head_divs = getElementsOfTagAndClass( 'div', 'nodelet_head' );
  var i;
  for ( i = 0; i < nodelet_head_divs.length; i++ ) {
    var spans = nodelet_head_divs[i].getElementsByTagName('span');
    var j;
    for ( j = 0; j < spans.length; j++ ) {
      if ( spans[j].className == 'title' ) {
        var title_span =  spans[j];
        var a = document.createElement('a');
        a.href = 'http://perlmonks.org/?node=' + title_span.innerHTML;
        a.innerHTML = title_span.innerHTML;
        title_span.removeChild(title_span.firstChild);
        title_span.appendChild( a );
      }
    }
  }
}