-(void)displayAdmobAd
{

    iSitesNavigationController *controller=(iSitesNavigationController *)self.navigationController ;

    BOOL isLandScape=[[(iSitesNavigationController *)self.navigationController appDelegate] isDeviceInLandScapeMode];

    if(!isLandScape)
    {
        // get the view frame
        CGRect frame = self.view.frame;

        UIView *adMobAd=[(iSitesNavigationController *)self.navigationController adMobAd];

        self.isAdBannerAvailable=YES;

        // put the ad at the bottom of the screen
        [adMobAd setFrame:CGRectMake(0, frame.size.height - 50, frame.size.width, 50)];

        [adMobAd setTag:ADMOB_VIEW_TAG];

        [self.view addSubview:adMobAd];

        self.webView.frame=CGRectMake(0, 0, self.webView.frame.size.width, self.view.frame.size.height-50);
    }

}