public function url($sUrl)
    {
        $sUrl = (substr($sUrl, 0, 4) != 'http') ? 'http://' . $sUrl : $sUrl;
        $this->sData .= 'URL:' . $sUrl . "\n";
        return $this;
    }
public function url($sUrl)
    {
        $sUrl = (substr($sUrl, 0, 4) != 'http') ? 'http://' . $sUrl : $sUrl;
        $this->sData .= 'URL:' . $sUrl . "\n";
        return $this;
    }
@param string $sUrl

@return self