The problem is from function zh_tw(), this is a function I used to create translation of Strings used in the program into Chinese characters.

Because some Chinese word use escape characters. It work fine with my computer because I have a Chinese operating system.

What you can do is change those special characters into your local language version if you want to make translation for local language version.
(You can also modified the name of the function, e.g. function void greece() )
It should work fine when you disable the page which cause error or translate those into you local language formate. If you want to know the meaning of those string, check out the Variables pages (under tab: [b]language[/b])
Add <param name=init value='greece()'> before the end of applet tag i.e. </applet>
This will tell EJS to execute function greece when it is loaded.