[jQuery] Foreign charachters in .post()

Hi,

Got a bit of a weird one here :/

The following code works fine:

jQuery.post("/cgi-bin/review.cgi", {
Review_Rating: the_rating,
ID: theID,
add_this_review: 1,
Review_Contents: contents,
Review_Subject: subject,
Review_ByLine: byline,
Review_GuestName: guestname,
Review_GuestEmail: guestemail,
add_review: 1,
SecurityImage: SecurityImage,
SessionID: SessionID
}, function(response){

jQuery('#ajax_rate_indicator').fadeOut();
setTimeout("finishAjaxReview('the_rating_box', '"+escape
(response)+"')", 400);
});

...*appart* from the fact stuff like:

ö =
ä =
ü =

..gets converted to:

ö =
ä =
ü =

I did a little bit of research, and found something about adding this
(but this seems to really be for a different jQuery function - which
is probably why its not working);

contentType: "application/x-www-form-
urlencoded;charset=ISO-8859-15",

Can anyone suggest how I could fix this issue with foreign
charachters?

TIA

Andy