var random_number = Math.random();
    if (random_number < .5){
				var google_ad_channel_top = '1115099684+6979606623+2046832681';
				var google_ad_channel_bottom = '1115099684+0791900173';
				var google_max_num_ads_top = '3';
				var google_max_num_ads_bottom = '5';
				var google_ad_type_top = 'text_html';
				var google_ad_type_bottom = 'text_html';
				var google_image_size_top = '300x250';
				var google_image_size_bottom = '728x90';
				var google_skip_bottom = '3';

    } else {
				var google_ad_channel_top = '1115099684+6979606623+4018345374';
				var google_ad_channel_bottom = '1115099684+0791900173';
				var google_max_num_ads_top = '4';
				var google_max_num_ads_bottom = '5';
				var google_ad_type_top = 'text';
				var google_ad_type_bottom = 'text';
				var google_image_size_top = '300x250';
				var google_image_size_bottom = '728x90';
				var google_skip_bottom = '4';
    }