将内联Javascript移动到外部文件时出错 - 我该如何解决这个问题？

There are dozens of similar questions here on stackoverflow, but I can't find an answer that works. I have a couple of Javascript functions that I'm using repeatedly in multiple pages, so I thought it would be a good idea to move them to external file(s). But when I do, they don't work.There are dozens of similar questions here on s