JavaScript edit record on a certain table.

Thanks for your reply. My understanding is that gReqAppDBID gets the table id of the current table. If I need to edit record on table "bnqepesti" how to I write that in the code page. I tried dbid: "bnqepesti" but its not working. 

Thanks again for your help.

here is a copy of my current code page:

var apptoken = "cci99s..............tqtfq";
$.ajaxSetup({data: {apptoken: apptoken}});

var description= prompt("Enter a brief description of the work done in this session: ", "");

var dbidTable = "bnqepesti";
var promise = $.get(dbidTable, {
  act: "API_EditRecord",
  rid: QBU_rid,
  _fid_20: description,
  _fid 6: "Out"
});

$.when(promise).then(function(){
  document.location.href = dbidTable + "?a=dr&rid=" + QBU_rid;
});