public function getAttribute($sSelectorWithAttribute)
    {
        $mAttribute = null;

        $sSelectorAttributeSeparator = '@';
        $iSeparatorPosition = strrpos($sSelectorWithAttribute, $sSelectorAttributeSeparator);
        if ($iSeparatorPosition !== false) {
            $sSelector = $this->_getSelectorWithoutAttribute($sSelectorWithAttribute, $iSeparatorPosition);
            $sAttributeName = $this->_getAttributeWithoutSelector($sSelectorWithAttribute, $iSeparatorPosition);

            $oElement = $this->getElementLazy($sSelector);
            $mAttribute = $oElement->getAttribute($sAttributeName);
        }

        return $mAttribute;
    }