768.07 Railroad liability for injury to employees.—If any person is injured by a railroad company by the running of the locomotives or cars, or other machinery of such company, the person being at the time of such injury an employee of the company, and the damage was caused by negligence of another employee, and without fault or negligence on the part of the person injured, her or his employment by the company shall be no bar to a recovery. No contract which restricts such liability shall be legal or binding.