I have used this one with good success in the past:

s/<\s*(?:no)?script.*<\/(?:no)?script\s*>//sig;
[download]

it only works on a scalar, so you will need to slurp your entire JS code into a scalar first. I am sure others have better regexes, but i thought i should share. :)

UPDATE:
fixed (i think) ... thanks sauoq :)

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)