function nodeform_form_alter(&$form, &$form_state, $form_id) {
    if ($form_id == 'article_node_form') {


      $form['#prefix'] = '<div style="background:#AAFF55;">';
      $form['#suffix'] = '</div>';
      $form['actions']['submit']['#value'] = t('Hammering');
      $form['title']['#default_value'] = t('Dance');
      $form['title']['#required'] = FALSE;





      $squery = db_select('taxonomy_term_data', 't');
      $squery
            ->fields('t', array('vid', 'name', 'tid', 'weight'))
            ->condition('t.vid', 2, '=')
            ->orderBy('t.weight', 'ASC');
      $sresult = $squery->execute();
      $soptions = array();
      foreach ($sresult as $srow) {
            $soptions[$srow->tid] = $srow->name;
      };

      $gquery = db_select('taxonomy_term_data', 't');
      $gquery
            ->fields('t', array('vid', 'name', 'tid', 'weight'))
            ->condition('t.vid', 3, '=')
            ->orderBy('t.weight', 'ASC');
      $gresult = $gquery->execute();
      $goptions = array();
      foreach ($gresult as $grow) {
            $goptions[$grow->tid] = $grow->name;
      };

      $subjids = array();
      if (!empty($form_state['values']['subject'])) {
        $subjids = array_filter($form_state['values']['subject']);
      }
      $gradids = array();
      if (!empty($form_state['values']['grade'])) {
        $gradids = array_filter($form_state['values']['grade']);
      }

      $topquery = db_select('taxonomy_term_data', 't');
      $topquery->join('field_data_field_topic_subject', 's', 't.tid = s.entity_id');
      $topquery->join(' field_data_field_topic_grade', 'g', 't.tid = g.entity_id');
      $topquery->fields('t', array('vid', 'name', 'tid'));
      $topquery->fields('s', array('field_topic_subject_tid'));
      $topquery->fields('g', array('field_topic_grade_tid'));
      $db_or = db_or();
      foreach ($subjids as $subjid) {
          $db_or->condition('s.field_topic_subject_tid', $subjid, '=');
          $topquery->condition($db_or);
      }
      $db_more = db_or();
      foreach ($gradids as $gradid) {
          $db_more->condition('g.field_topic_grade_tid', $gradid, '=');
          $topquery->condition($db_more);
      }
      $topresult = $topquery->execute();
      $topoptions = array();
      if (!empty($form_state['values']['subject']) || !empty($form_state['values']['grade'])) {
          foreach ($topresult as $toprow) {
                $topoptions[$toprow->tid] = $toprow->name;
          };
      }
      else {
         $topoptions = array();
      }



      $form['subjectblock'] = array(
            '#type'     => 'fieldset',
            '#title'     => 'Subject',
            '#weight'   => '12',
      );
      $form['subjectblock']['subject'] = array(
            '#type'     => 'checkboxes',
            '#options' => $soptions,
            '#prefix' => '<div style="background:#FF7F55;">',
            '#suffix' => '</div>',
            '#ajax' => array(
                'callback' => 'make_topic_chex_callback',
                'wrapper' => 'gunge, pow',
                'method' => 'replace',
                'progress' => array('type' => 'none'),
            ),
      );
      $form['gradeblock'] = array(
            '#type'     => 'fieldset',
            '#title'     => 'Grades',
            '#weight'   => '12',
      );
      $form['gradeblock']['grade'] = array(
            '#type'     => 'checkboxes',
            '#options' => $goptions,
            '#prefix' => '<div style="background:#557FFF;">',
            '#suffix' => '</div>',
            '#ajax' => array(
                'callback' => 'make_topic_chex_callback',
                'wrapper' => 'gunge, pow',
                'method' => 'replace',
                'progress' => array('type' => 'none'),
            ),
      );
      $form['topblock'] = array(
                '#type'     => 'fieldset',
                '#title'     => 'Topics',
                '#weight'   => '12',
      );
      $form['topblock']['topics'] = array(
            '#type'     => 'checkboxes',
            '#options' => $topoptions,
            '#prefix' => '<div id="gunge" style="background:#FFAA00;">',
            '#suffix' => '</div>',
      );



      }
}


function make_topic_chex_callback($form, $form_state) {
  return $form['topblock']['topics'];
}