Chobots Glitch (somewhat old)

Hey guys, I was on chobots.de (because it isn't blocked on my desktop), and I was looking at my friends and I saw that when you hover over the part where trade/present is. Then it highlights it. It goes the same for Ban but I couldn't get it. Picture for proof: (where the red dot is, is where my mouse was hovering):

These are 3 pictures combined thats y there it is 3 of the same person.