Ayuda con Comando Javascript (help Javascript?

Question

tengo problemas en mi PC al ejecutar este comando por sublime appendChild dice que no es válido el comando intenté con Chrome y Firefox y nada el mismo error .This command problem in my PC (appendChild)

Answer 1

gt: Help with Javascript Command (help Javascript?

I have problems on my PC when executing this command by sublime appendChild says that the command I tried with Chrome and Firefox is not valid and nothing the same error. This command problem in my PC (appendChild)