Mouse with multiple buttons

[ScarabBp]

This might be a paranoid question, but I don't want to get in trouble. I really enjoy EQ, it is my favorite game.

Are mice with multiple buttons allowed? I have a mouse with 12 buttons.

If I were to bind one keyboard key to a mouse button, would that be allowed? Just one keyboard key like L, per mouse button.

For example:
Mouse button one = L
Mouse button two = M
Mouse button three = K
etc.