public function isSelected($xpath) {
    $elements = $this->findElement($xpath, 1);
    $javascript = $this->javascriptTemplateRender("is_selected.js.twig", array("xpath" => $xpath));
    $tagName = $this->browser->tagName($elements["page_id"], $elements["ids"][0]);
    if (strcmp(strtolower($tagName), "option") !== 0) {
      throw new DriverException("Can not assert on element that is not an option");
    }

    return $this->browser->evaluate($javascript);
  }