best choice would be to download these ONLY
Code: 
http://www.google-analytics.com/ga.js 
https://pagead2.googlesyndication.com/pagead/show_ads.js 
https://tpc.googlesyndication.com/pagead/images/ad_choices_i.png 
https://tpc.googlesyndication.com/pagead/images/ad_choices_en.png 
https://pagead2.googlesyndication.com/pagead/expansion_embed.js 
https://pagead2.googlesyndication.com/pagead/osd.js
and host them directly.