Line 368 using wrong string method.

[jackd1]

Line 368 in firetext.js is clearly using the wrong string method (sub is for surrounding the text with a <sub> tag). I meant to file this a while ago. Does anyone know which method this should be? (there are several slightly different string methods that this might be)

[ferndot]

Maybe string.substring()? That is a common error.

[jackd1]

Probably either substring or substr. They behave the same with one arg. though, I'll make a quick fix.