Board Thread:Support Requests - Getting Technical/@comment-5123232-20130116133552

I've seen many people using this called 'Chat Hacks' and I don't understand how it works.. So I was just wondering if anyone can explain how the code really works. And yes, I do have the code in my global.js but I just don't understand how it works.. I also tried reading this, but I really would like someone to explain me. 