Logging edits to a record

Thanks! I'm not very knowledgeable in javascript so I apologize for my repeated questions. I still can't seem to get it to work. Below is the code that I have on my module.js page. If you could provide any guidance on where I'm going wrong I would greatly appreciate it!!!

(function(){
  var querystring=document.location.search;

  if (/dlta=mog/i.test(querystring)) {

$("#_fid_341").attr("readonly", "readonly");

var label, oldValue, newValue, log;

$("#_fid_339, #_fid_328, #_fid_203, #_fid_103, #_fid_318", #_fid_27, #_fid_170, #_fid_28).on("change", function() {

  log = [];
  _.each([339, 328, 203, 103, 318, 27,170, 28], function(fid) {
    oldValue = $("[name=_fid_oval_" + fid + "]").val();
    newValue = $("#_fid_" + fid).val();
    if (oldValue != newValue) {
      label = $("label[for=_fid_" + fid + "]").text();
      log.push(label + " was =" + oldValue + "; now =" + newValue);
    }
  });
  $("#_fid_341").html(log.join("\n"));

})();