shit challenge: numerics to words

Weekly Challenge: Programmatically convert any¹ string of digits, such as "1234567" to word form, "one million, two hundred thirty-four thousand, five hundred sixty-seven"

Here is mine: http://codepad.org/gyqbaKxx

Criticize my code.  I know it sucks anus.  I would like to make it better.  Submit your own versions as well.

Use whatever language you like[i]!/i]

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1. Up to 18 significant digits is fine.

>>69
Xarn hasn't won most challenges in /prog/'s history. Still, if you're worried, these challenges could probably have one category for Xarn, and one for best of the rest.

>>70
>>17, I'm pretty sure.