Drupal.behaviors.printLinks

printLinks.js

(function($) {

/**
 * Put numbers after all links and list em at the bottom of the body
 */
Drupal.behaviors.printLinks = function(context) {
  var printLinks = Drupal.printLinks,
      exceptions = ([
        'ul.menu a'
      ]).join(', ');

  if (printLinks.wrapper === false) {
    printLinks.init();
  }

  $('a')
  .not(exceptions)
  .not('.printLinks-processed')
  .addClass('printLinks-processed')
  .each(function() {
    var $this = $(this);
    if (printLinks.checkLink($this)) {
      printLinks.links.push($this);
    }
  });

  // Only act if we have new links to add.
  if (printLinks.wrapper && printLinks.wrapper.find('li').length < printLinks.links.length) {
    var am = printLinks.links.length,
        $lis = printLinks.wrapper.find('li'),
        lis = $lis.length,
        arr = [];

    for (; lis < am; lis++) {
      arr.push('<li>' + printLinks.links[lis][0].href + '</li>');
      // People often have an inner span in their links
      if (printLinks.links[lis].find('span').length) {
        printLinks.links[lis].find('span').append('<sup class="printLinks-number print-only">' + (lis+1) + '</sup>');
      }
      else {
        printLinks.links[lis].append('<sup class="printLinks-number print-only">' + (lis+1) + '</sup>');
      }
    }
    if (arr.length) {
      printLinks.wrapper.append(arr.join(''));
    }
  }
}

Drupal.printLinks = {
  links: [],
  init : function() {
    this.wrapper = $('<div id="printlinks-wrapper" class="print-only"><h2>' + Drupal.t('Links') + '</h2><ol></ol></div>').appendTo('body').find('ol');
  },
  wrapper: false,
  checkLink : function($el) {
    var at = $el.attr('href');
    // returns false for links with no href, with only a hash, mailto links and invisible links
    return at && at != $el[0].hash && at != '#' && !$el.is('[href^="mailto:"]') && !$el.is(':hidden');
  }
}

})(jQuery);

should really just fake print state and capture links then