That is Javascript and has nothing to do with the server, but requires the user to have JavaScript enabled on their browser. That shouldn’t be an issue for over 99% of users.
Everyone should remember that there are no “Copyright Police” at least not here in the U.S., so any protection you have is only as good as you will take it in civil actions. So unless you intend to hire a lawyer to take action against someone who has stolen your content, placing the Copyright on the page is pretty much just for show.
If you think sometime, you want to take action, then they base Copyright on who owned it first. So by placing the current year only on a copyright statement and not the first year you published, that content could weaken your claim.
Btw: we have covered a lot of this in previous posts.