G'day all

I'm working on a challenge given to me. The Javascript I have been
given parses the user input in two ways.

Firstly it generates two numbers. One is the sum of the CharCodes and
the other is the product of multiply each of the charcodes together
and usisng the Modulus function.

If the text string is correct, the string is then used to decode (via
a relatively simple crypt) another...