Board Thread:Support Requests - Getting Technical/@comment-25391160-20141029194409/@comment-12198205-20141104062903

You have to use js. Put this into your wiki's MediaWiki:Wikia.js: $( function {     var images = [      '[BG IMAGE URL #1]',      '[BG IMAGE URL #2]',      '[BG IMAGE URL #3]'    ];    $( 'body.mediawiki' ).css( 'background-image', 'url(' + images[ Math.floor( Math.random * images.length ) ] + ')' ); } ); Notes:
 * Replace [BG IMAGE URL] into the full url of the image you want.
 * You could add more urls into it, just copy the same pattern as the above.