function openPopup(url, width, height, scroll) {
    w = window.open(
        url,
        'popup',
        'width=' + width + ',height=' + height + ',scrollbars=' + scroll + ',resizable'
    );
    w.focus();
}

function openNewsPopup() {
    openPopup('?action=pg_view_news&popup=1', 700, 500, 'no');
}

function openNewsArticlePopup(articleId) {
    openPopup('?action=pg_view_news_article&article_id=' + articleId + '&popup=1', 700, 500, 'no');
}

function openSpecialOffersPopup() {
    openPopup('?action=pg_view_special_offers&popup=1', 700, 500, 'no');
}

function openSpecialOfferPopup(specialOfferId) {
    openPopup('?action=pg_view_special_offer&special_offer_id=' + specialOfferId + '&popup=1', 700, 500, 'no');
}