[jQuery] set charset of request header in jQuery.ajax

[Marc]

Hi

i have an Oracle DB with WE8ISO8859P15 charset and a website with
ISO-8859-15 charset in headers. Until I use jQuery all works fine, but
now i'm using an ajax function to submit a form inside a jQuery ui
dialog, like this:

<script type="text/javascript">
  jQuery("#btn_submit").click(function(){
    jQuery.ajax({
      type: "POST",
      datatype: "script",
      scriptCharset: "ISO-8859-15",
      url: [some url],
      data: jQuery("#form").serialize(),
      beforeSend: function(xhr) {
        xhr.setRequestHeader("Accept-Charset","ISO-8859-15");
        xhr.setRequestHeader("Content-type","application/x-www-form-
urlencoded; charset=ISO-8859-15");
      },
      success: function(data) { jQuery("#dialog").html(data); }
    });
  });
</script>


When i click in the submit button the data like 'à' is saved into the
DB in UTF-8 with bad characters and then is not displayed correcly.

In the request header shown by firebug i see 'Content-Type:
application/x-www-form-urlencoded; charset=UTF-8', and i don't know
how to modifiy this. I try using the 'scriptCharset' or 'beforeSend'
showed in the script above and no result obtained.

How can i modify the charset in the request header sended by
jQuery.ajax to ISO-8859-15 ?

Thanks a lot!