protected function _htmlHeader()
{
    $html = '

        <h2>' . Mage::helper('lowstocknotify')->__('Low stock report') . '</h2>

            <p>' . Mage::helper('lowstocknotify')->__('There are %s products in low stock, here are list', $this->_count) . ':</p>

            <table border="1" cellpadding="1" cellspacing="1" style="width: 500px;">
                <tbody>
        <tr>
            <td>' . Mage::helper('lowstocknotify')->__('N.') . '</td>
            <td>' . Mage::helper('lowstocknotify')->__('ID') . '</td>
            <td>' . Mage::helper('lowstocknotify')->__('SKU') . '</td>
            <td>' . Mage::helper('lowstocknotify')->__('Name') . '</td>
            <td>' . Mage::helper('lowstocknotify')->__('Qty') . '</td>
            <td>' . Mage::helper('lowstocknotify')->__('Low stock from') . '</td>
        </tr>

    ';

    return $html;
}

protected function _htmlFooter()
{
    $html = '';
    return $html;
}