Thank you, Dr JFBurté, very much.
Some notes for others who want the same AND a question on lay-out of the buttons.
You can find the script for common.js at [[Mediawiki:Edittools.js]]
You need three things as well: a line in LocalSettings (don't forget to make the extra
directory) and 2 php extensions.
You can find those at:
For the lay-out of the buttons I need the following css:
In which css file should they be placed?
ps: what does your last remark : "@+ de jfb "0.02$"" means