adres bar thacker
http://support.addthis.com/customer/portal/articles/381254-address-bar-sharing-analytics
I didn`t understand where to input that code? I checked on russian in google and there are many topics with that question, 0 answer. Can you explain better for noooobs?:)
You need to add that code to the HTML of your page. If you're not comfortable editing the HTML yourself I would find someone who is.