Drupal.checkAllGroup = function (group) {
  Drupal['checkAll'+group+'Status'] = !Drupal['checkAll'+group+'Status'];
  
  $('input[@type=checkbox][@name^='+group+']').each(function() {
    this.checked = Drupal['checkAll'+group+'Status'];
  });
}

Drupal.checkAllAttachGroup = function (group) {
  Drupal['checkAll'+group+'Status'] = false;

  $('input[@type=checkbox][@name^='+group+']').each(function() {
    $(this).dblclick(function() {
      Drupal.checkAllGroup(group);
    });
  });
}

Drupal.checkAllAttach = function () {
  var _groups = {};
  $('input[@type=checkbox][@class*="checkboxes-"]').each(function() {
    groupClass = $.grep($(this).attr('class').split(' '), function(i) { return i.indexOf('checkboxes-') == 0 })[0];
    group = groupClass.substr('checkboxes-'.length);

    if (!_groups[group]) {
      Drupal.checkAllAttachGroup(group);
      _groups[group] = true;
    }
  });
}

if (Drupal.jsEnabled) {
  $(document).ready(function() {
    Drupal.checkAllAttach();
  });
}