code: public function getFrameset()
      {
          if (! $this->hasFrames()) {
              return false;
          }
          $urls = array();
          for ($i = 0; $i < count($this->frames); $i++) {
              $name       = $this->frames[$i]->getAttribute('name');
              $url        = new SimpleUrl($this->frames[$i]->getAttribute('src'));
              $key        = $name ? $name : $i + 1;
              $urls[$key] = $this->expandUrl($url);
          }
  
          return $urls;
      }
docs: Accessor for frame name and source URL for every frame that will need to be loaded.
  Immediate children only.
  
  @return boolean/array     False if no frameset or otherwise a hash of frame URLs.
  The key is either a numerical base one index or the name attribute.