Board Thread:Support Requests - Getting Technical/@comment-25324252-20141014164145

My JS skills are unfortunately lacking so if someone could build this for me, it would be appreciated. If anyone has ever used a video player with the turn off the lights button, its a fairly simple button that turns the background black. What I was hoping for was to have a button like this for a wiki where one press would turn the wiki background and page background black and then on a second press restore it to how it was. 