Thanks you both.
Of course I read the manual too, no can do without it. It was a big help to release my previous Button: Merge Folders v2 VBS script without asking anyone. But it was an enhancement of an existent script and VBS is intuitive and more human readable while JS need you to study its versatile syntax, anonymous function, object/class creation, etc. There resides its power.
Yes, tbone, I'm not a really bloody beginner but my JS skills have never got the opportunity to be used and exceed the basics to manipulate the DOM in the past, never had to build class, etc. I need to revise the basics and more. It's kind of exiting too although my brain is about to explode sometimes when I'm stuck with an error or an expected situation.
I'm gonna study your return and maybe let go ArgsMagic.
Thanks