skx has beter advice, but as for the question as you posed it: 
s/<script[^>]*>.*?<\/script>//igs;

[download]
should work. It accepts any characters that are not ">", up to the ">" that terminates the tag. It may not be the best solution to this particular problem, but it's a very handy regex idiom to have ready access to.

In reply to Re: Regex: Strip <script> tags? by rodion
in thread Regex: Strip <script> tags? by Spidy

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