Acid,
Ahhh - figured it out. For some reason the install instructions within the code tags in my post were being screwed up. The code tag added spaces as shown between the n and the t:
"b=b.offsetParen t"
Now I only have the instructions in the zip attached. Please just download the zipped txt and copy the function from there. Sorry for the inconvenience - I guess code tags aren't suited for pasting in javascript