[Javascript] How to insert javascript in this theme

I have add google adsense in my site. I am working on child theme (Magazine Basic).

The code i received from google is not showing on the site. After some research I find out that need to check my javascript if its working or not.

Any help please! I had hope if the author of this theme would hear this request.

Thanks in advance.

http://wordpress.org/themes/magazine-basic/