Change night mode in "gakkougurashi.com"

gakkougurashi.js

// Chrome console
$("body").removeClass('morning').addClass('night');url="core_sys/images/main/top/main_img_ni.jpg";a=new Image();a.onload=function(){$("#main_img").children("img").attr({'src':url});};a.src=url;

// URL
javascript:(function(){$("body").removeClass('morning').addClass('night');url="core_sys/images/main/top/main_img_ni.jpg";a=new Image();a.onload=function(){$("#main_img").children("img").attr({'src':url});};a.src=url;})();