The problem of garbled Chinese Characters in Ajax and JS files

I recently developed an Ajax plug-in, but when I called JavaScript, I found that Chinese characters are garbled and I cannot write them in English. I found a solution today.

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If the encoding rule of Web application is UTF-8, garbled characters will occur in the JS file if there are any Chinese characters (it may be that other pages are abnormal)
To solve this problem, add charset = "gb2312" or charset = "big5" to the Javascript reference"
Example: <SCRIPT type = "text/JavaScript" Language = "JavaScript" src = "scripts/function. js" charset = "gb2312"> </SCRIPT>