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function unicodeToBytes(content, charset)
{
try
{
const cc = Components.classes;
const ci = Components.interfaces;
const unicodeConverter = cc["@mozilla.org/intl/scriptableunicodeconverter"].createInstance(ci.nsIScriptableUnicodeConverter);
unicodeConverter.charset = charset;
content = unicodeConverter.ConvertFromUnicode(content);
return content;
}
catch (err)
{
alert(err);
}
}
var data = unicodeToBytes("中文","utf-8");
alert(window.atob(window.btoa(data)));