'name'=>'delete_invoice_entries',
'data'=>array('0'=>$i18n->getKey('dropdown.do_not_delete'),'1'=>$i18n->getKey('dropdown.delete')),
));
-$form->addInput(array('type'=>'submit','name'=>'btn_delete','value'=>$i18n->getKey('label.delete')));
+$form->addInput(array('type'=>'submit','name'=>'btn_delete','value'=>$i18n->getKey('label.delete'),'onclick'=>'return confirm_deleting_entries();'));
$form->addInput(array('type'=>'submit','name'=>'btn_cancel','value'=>$i18n->getKey('button.cancel')));
if ($request->isPost()) {