public function getElementHtml()
{
$html = parent::getElementHtml();
$htmlId = 'use_config_' . $this->getHtmlId();
$html .= '<input id="' . $htmlId . '" name="use_config[]" value="' . $this->getId() . '"';
$html .= $disabled ? ' checked="checked"' : '';
if ($this->getReadonly() || $elementDisabled) {
$html .= ' disabled="disabled"';
}
$html .= ' onclick="alert();" class="checkbox" type="checkbox" />';
$html .= ' <label for="' . $htmlId . '" class="normal">' . Mage::helper('adminhtml')->__('Use Config Settings') . '</label>';
$html .= '<script type="text/javascript">toggleValueElements($(\'' . $htmlId . '\'), $(\'' . $htmlId . '\').parentNode);</script>';
return $html;
}
