Maintenance Mode with a button

[SampleWEBM]

Español / Spanish (Original Message):

Hola, a mi parecer esta es la comunidad mas rápida y amigable en cuanto a foros, todos tienen un gran conocimiento, y bueno, les comento:
Yo tengo un archivo que es mantenimiento.html adminpanel.html y index.html
Yo quiero incluir una función en adminpanel que al tocarlo index pase a ser index2.html y mantenimiento pase a ser index.html es decir; mediante un botón de admin panel que la página comienze su mantenimiento. ¿Cómo podría hacerlo?

Ingles / English (Traslated):
Hello, in my opinion this is the fastest and most friendly community in terms of forums, everyone has a great knowledge, and well, I comment:
I have a file that is mantenimiento.html, adminpanel.html and index.html

I want to include a button in adminpanel that causes index.html to become index2.html and maintenance to be index.html: In summary, I want a button on admin panel that activates the maintenance system

Thanks in advance.

[Kindred]

https://wiki.simplemachines.org/smf/SMF2.0:Server_settings

Enable Maintenance Mode - Sets whether the forum is in maintenance mode. If ticked Maintenance mode will be activated. Thus, only administrators can use the forum as usual. Other users get a 'this forum is in maintenance mode' message. The database may still be accessed for user authentication (to tell if the member is an administrator).

[Arantor]

And for several technical reasons this should not be a button available everywhere.