Yes, I have understood you every time. What you are not getting is that you need to debug the code. I don't have the answer for you but that person took the time to write an article and I trust that it is correct. So, findtoolbar is code to find the toolbar but if it is in the article it's important for a reason. The $print part looks like it is the actual button. I believe, as I have stated, that findtoolbar is an existing Microsoft function that gets called already. The article, I believe, is hoping that this new findtoolbar function will get called instead of the built-in one and this new one works in chrome and firefox.
There are only 10 types of people in the world, those who understand binary and those who don't.