/**
  * Return label for "Use default" checkbox
  *
  * @param Varien_Data_Form_Element_Abstract $element
  * @return string
  */
 public function getInheritElementLabelHtml(Varien_Data_Form_Element_Abstract $element)
 {
     return sprintf('<label for="%s" class="inherit" title="%s">%s</label>', $element->getHtmlId() . '_inherit', $element->getDefaultValue(), Mage::helper('adminhtml')->__('Use Default'));
 }