Thread:JoetjeF/@comment-5496857-20150825132705/@comment-3083005-20150921094632

Ericwong99 wrote: Copy this this code (function MainPage{if("undefined"==typeof jQuery)setTimeout(MainPage,100);else{var a=$("#main_page_center").find("img"),b=$("#main_page_right").children("span");a.css("cursor","pointer").css("margin","5px 0").click(function{var c=a.index(this);a.fadeTo(0,.5);$(this).fadeTo(0,1);b.hide;b.eq(c).show}).not(":eq(0)").fadeTo(0,.5)}}); paste to MediaWiki:MainPage so can work I don't know I can't edit.

I cannot edit it either, what does this script do?