I tried putting this line but it doesn't work:
// @require http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.js
jQuery doesn't work in Greasemonkey at all. Is there other way to use jQuery in Greasemonkey?
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For all the people who have the same problem, you must upload the file to greasespot then install it from there.
The Create New Script option wouldn't work!