public function setTitle($title)
    {
        // Check if title already exists
        $headTitle = $this->selectElement('title')->item(0);
        if (!is_null($headTitle)) {
            $headTitle_new = $this->create('title', $title);
            $headTitle->parentNode->replaceChild($headTitle_new, $headTitle);
        } else {
            $headTitle = $this->create('title', $title);
            $this->appendToHead($headTitle);
        }

        return $this;
    }