'empty'=>array(''=>$i18n->getKey('dropdown.select_invoice'))));
$form->addInput(array('type'=>'submit','name'=>'btn_assign','value'=>$i18n->getKey('button.submit')));
$smarty->assign('use_assign_to_invoice', true);
'empty'=>array(''=>$i18n->getKey('dropdown.select_invoice'))));
$form->addInput(array('type'=>'submit','name'=>'btn_assign','value'=>$i18n->getKey('button.submit')));
$smarty->assign('use_assign_to_invoice', true);