[jQuery] error with $(this).val(value) in IE 6.x

[code_berzerker]

for some empty select elements inside form and table I've done
something like that:

$.each(
        $('#form_table .mt_type'),
        function()
        {
          elemId = $(this).attr('id');
          //alert(elemId);
          $(this).html('\
              <option value="0">-- wybierz --</option>\
              <option value="1">val1</option>\
              <option value="2">val2</option>\
              <option value="3">val3</option>\
              <option value="4">val4</option>\
          ');

        // both of following give me error in IE6, FF and Opera report
no problem.
        $(this).val(0);
        $('#'+elemId).val(0);
       }
);

I set the val to 0 coz in FF it shows 5th ('4') option as selected.