Wikipedia:Tools/Back to top

It's a tool that you can back to the top of a page by clicking the down-right button. It works on zh but doesn't work on en, needing experts' concern.

Please copy the following code and save it to your common.js page. importScript("Wikipedia:Tools/Back to top/c-top.js");

The source code is in Tools/Back to top/c-top.js. The original creater is zh:User:XiaoZhou.