javascript - CKEditor - Using GetData() -

i struggling implementing following:

i have button creates cke instance (outside form):

<button type="submit" class="btn btn-default btn-sm" onclick="javascript: var editor81 = ckeditor.replace('divtext81')" value="edit">edit</button> 

i have save button (outside form):

<button type="submit" class="btn btn-default btn-sm" id="save81" value="save">save</button> 

i use following javascript post mysql database:

        $(document).ready(function (argument) {          $('.btn').click(function () {                id = $(this).attr('id').replace('save','');              $edit = ckeditor.instances.editor81.getdata();              $cid = $('#cid' + id).val();              $action = $('#action' + id).val();              $eid = $('#eid' + id).val();              $.ajax({                  url: 'include/editupdate.php',                 type: 'post',                 data: {                     data: $edit,                     cid: $cid,                     eid: $eid,                     action: $action                 },                 datatype: 'html',                 success: function (rsp) {                     alert(rsp);                 }             });         });     }); 

the information posts fine database except not pick data editor instance, field blank. of other fields ok. suffix 81 record id.

i know how close editor instance after posting database.

many thanks