var kigyologCid = (new URL(window.location.href)).searchParams.get('kigyolog_cid');

if (kigyologCid) {
    var kigyologExpiresDate = new Date();
    kigyologExpiresDate.setTime(kigyologExpiresDate.getTime() + (7 * 24 * 60 * 60 * 1000));

    document.cookie =
        'kigyolog_advertisement_url_click_id=' + kigyologCid + ';' +
        'expires=' + kigyologExpiresDate.toUTCString() + ';' +
        'path=/';
}