Encoding problem for special characters

Hello,

I have a problem which I think comes from encoding, but I couldn't find out
for now how to solve it:

In a new template, I create links that call the same page with some
GET-parameters, which I encode by the javascript method "encodeURI". (for
example, this turns é into %C3%A9).

When using the template on 2 different Jahia servers (being identical in
their jahia webapp), I get different results when displaying the encoded
parameters received from the request: for the one it shows as it should, for
the other special characters are not displayed correctly/replaced by bizarre
characters, like é instead of é.

When using the "escape" method instead of "encodeURI" (thus encoding é as
%E9), it is the opposite: the first site has problems displaying special
characters (a square instead of the é), and the second one displays them
okay.

I read that the character "é" is encoded to %C3%A9 in UTF-8, and encoded to
%E9 in iso-8859-1. As in both cases the same template is used (which uses
UTF-8 as charset), it seems to me as if the two servers use different
encoding, although their jahia webapp is the same.

Does anyone know how I can find out the difference and how to solve this
problem in my template (retrieving the used encoding for example)? Thanks!

Regards,
Juliette