WOW. I think you kinda either went WAY off track here...
You do not need JavaScript to run NinjaLister nor to upload from NinjaLister.
You need a valid seller+ Lifetime account and then go to:
My eBid -> Bulk Uploads - On the right side you'll see NinjaLister blurb and below that will be TWO links - one is to download adobe air (if you dont have it already installed by some other application) and the other is to download the beta version of NinjaLister. If you do not see the download link for NinjaLister Beta 0.95 , then you probably are not Seller+ Lifetime subscriber.
If you manage to get that far, then..
Once you have downloaded and installed NinjaLister, you'll be presented with option to select country where you registered, and enter your ebid username and password. then you should be able to create new listings, import FeeBay TL exported CSV's or import eBid .txt export files, then edit and place in GtG bucket and upload the listings.
If you still have issues, take a screen shot
On windows, hit the Print Screen or Prt Scr key (on a 101 key keyboard it's usually somewhere in the top right area above number keypad or above cursor keys) - as soon as you hit that (you wont see anything happen) - go to Start->applications->accessories->Paint - open MS Paint and start a new file, right click in the white area and click Paste , your screen shot is right there.. (you can also hit Ctrl+V to paste) - save as a .jpg file and you can upload somewhere- forums, photobucket, wherever.. and then you can give us a link to it so we can see what you see.