public void AdDisplayed(string type)
    {
        AdvertisementRevMob revmob = ((AdvertisementRevMob)o_revmob);

        if (type == ADS_TYPE_REVMOB_BANNER)
        {
            revmob.receivedBanner(true);
        }
        else
        {
            revmob.receivedInterstitial(true);
        }
    }
    public void AdDidFail(string type)
    {
        AdvertisementRevMob revmob = ((AdvertisementRevMob)o_revmob);

        if (type == ADS_TYPE_REVMOB_INTERSTITIAL)
        {
            revmob.receivedInterstitial(false);
        }
        else if (type == ADS_TYPE_REVMOB_BANNER)
        {
            revmob.receivedBanner(false);
        }
        else
        {
            revmob.receivedWidget(false);
        }
    }