function onBatchSelected(article) {
    console.log(arguments);

    if (window.parent === window.self) {
        return;
    }

    sendBatchSelectedMessage(article, document.referrer);
}
function sendBatchSelectedMessage(article, host) {
    window.parent.postMessage({
        event: 'BATCH_SELECTED',
        batch: {
            article: article,
        }
    }, host)
}