JavaScript edit record on a certain table.

Thanks again for your quick reply.

I am using this code as your directions but when I click the button on the parent table. It freezes an does nothing.

Here is the button formula:

"javascript:" &
"var QBU_rid = '" & [Maximum In Record ID#] & "';" &
"$.getScript(gReqAppDBID + '?a=dbpage&pagename=myscript.js');" &
"void(0);"

here is the myscript.js content

(function(){
  var dbid = "bnqepesti";
  var dbidTable = table dbid
  var apptoken = "I put my token here";
  $.ajaxSetup({data: {apptoken: apptoken}});
  var description= prompt("Enter a brief description of the work done in this session: ", "");
  var promise = $.get(dbidTable, {
    act: "API_EditRecord",
    rid: QBU_rid,
    _fid_20: description,
    _fid_6: "Out"
  }).then(function(xml) {
    console.dirxml(xml);
    document.location.href = dbidTable + "?a=dr&rid=" + QBU_rid;
  });
})();