Well, logically you should be able to run it just off your local java. Otherwise you could potentially use a free online pastebin like
http://jsbin.com/ to run it as well.
However the main problem is right now that there are 90 prompts to click through which is tedious to say the least considering there's a max of like 6 properties per item. I think I may try to edit one of the calculator pages that are out there to see if I could get a whole website working which would be immensely more easy. Open page, enter values, click okay there's the script. Take a few pics, upload them. Done.
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Creator of the Unofficial Nevergrind Wiki Tool
http://www.unofficialnevergrindwikitool.com/Warlock Corpse -Dark Elf Necromancer