Board Thread:Support Requests - Designing Your Wiki/@comment-31106936-20180709012938/@comment-168424-20180711044423

Okay so, just for reference you might want to read up on Help:Advanced CSS and JS and Help:JavaScript review process. When you submit wiki-wide JS, it needs to get approved by FANDOM staff, so don't submit it during a time when they won't be working (aka outside 9 am to 5 pm Pacific, most likely). So you will have to check on its status which should show up in the sidebar of the JS page.

Try putting the following in your MediaWiki:Wikia.js which should switch between 3 random backgrounds.

// Random Page Background // Author: Dim@s535 function randomBg { var imgs = [ 'https://vignette.wikia.nocookie.net/electroincsuperjoy/images/c/c6/ESJ-Green.png/revision/latest?cb=20180711012605', 'https://vignette.wikia.nocookie.net/electroincsuperjoy/images/e/e8/ESJ-Black.png/revision/latest?cb=20180711012604', 'https://vignette.wikia.nocookie.net/electroincsuperjoy/images/6/6d/ESJ-Orange.png/revision/latest?cb=20180711012650' ];   $('body').css('background-size', 'cover'); $('body').css('background-image', 'url(' + imgs[Math.floor((imgs.length) * Math.random)] + ')'); } randomBg;