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Last-Modified: Sun, 09 October 2003 02:57:21 GMT
so Google never touches the script again?
You could try this:
Header set Last-Modified: "Sun, 09 October 2003 02:57:21 GMT"
However, I would not count on this method if it is an absolute requirement that Google never fetch the script again. Normally, they won't re-fetch a page if it hasn't changed since the last time they fetched it. But there's nothing to guarantee that they won't *ever* re-fetch a page.