public function getNotifyLowstockJs() { $html = parent::getAfterElementHtml(); $html .= ' <script type="text/javascript"> var switchNotifyLowstockSelect = function() { if ($("notify_lowstock").value==1) { $("notify_lowstock_qty").up("tr").show() $("notify_lowstock_qty").enable() } else { $("notify_lowstock_qty").up("tr").hide() $("notify_lowstock_qty").disable() } } $("notify_lowstock").observe("change", switchNotifyLowstockSelect) document.observe("dom:loaded", switchNotifyLowstockSelect) </script> '; return $html; }