if (!Zend_Validate::is($this->getRequest()->getPost('product[name]'), 'NotEmpty')) {
            $error = true;
            Mage::getSingleton('core/session')->addError(Mage::helper('example')->__('Please enter product name'));
        }

        if (!Zend_Validate::is($this->getRequest()->getPost('product[description]'), 'EmailAddress')) {
            $error = true;
            Mage::getSingleton('core/session')->addError(Mage::helper('example')->__('Please enter Email'));
        }