Saving files as jpg from InDesign CS4 js

Question

Hi, Kasyan.
You originally gavy me this script to re-save files as pngs, and now I need it to re-save them as jpgs instead. I made some changes, but I must have missed something, because it's not working. Could you take a look at it:
#target indesign
var myDoc = app.activeDocument;
var myFolder = Folder.selectDialog ("Select the output folder for JPG images");
SetDisplayDialogs("NO");
OpenFiles();
SetDisplayDialogs("ALL");
UpdateAllOutdatedLinks();
alert("Done");
function OpenFiles(){
     for (var i = myDoc.links.length-1; i >= 0; i--) { // process links collection backwards since it's changing!
          var myLink = myDoc.links[i];
          if (myLink.linkType != "Joint Photographic Experts Group (JPEG)"){
               var myImage = myLink.parent;
               var myImagePath = myLink.filePath;
               var myImageFile = new File(myImagePath);
               var myNewPath =  myFolder.absoluteURI + "/" + GetFileNameOnly(myImageFile.name) + ".jpg";
               CreateBridgeTalkMessage(myImagePath, myNewPath);
               Relink(myLink, myNewPath);
function CreateBridgeTalkMessage(myImagePath, myNewPath) {
     var bt = new BridgeTalk();
     bt.target = "photoshop";
     var myScript = ResaveInPS.toString() + "\r";
     myScript += "ResaveInPS(\"" + myImagePath + "\", \"" + myNewPath + "\");";
     bt.body = myScript;
     bt.onResult = function(resObj) {}
     bt.send(100);
function ResaveInPS(myImagePath, myNewPath) {
     try {
           var myPsDoc = app.open(new File(myImagePath));
             if (myPsDoc.mode == DocumentMode.CMYK) {
                    myPsDoc.changeMode(ChangeMode.RGB);
           var docName = myPsDoc.name;
          var myJPGSaveOptions = new JPGSaveOptions();
          myJPGSaveOptions.interlaced = false; // or true
          myPsDoc.saveAs(new File(myNewPath), myJPGSaveOptions, true);
          myPsDoc.close(SaveOptions.DONOTSAVECHANGES);     
     catch (err) {
          try {
               app.activeDocument.close(SaveOptions.DONOTSAVECHANGES);
          catch (err) {}
function Relink(myLink, myNewPath) {
     var newFile = new File (myNewPath);
     if (newFile.exists) {
          var originalLinkFile = new File(myLink.filePath);
          myLink.relink(newFile);
          try { // for versions prior to 6.0.4
               var myLink = myLink.update();
          catch(err) {}
function SetDisplayDialogs(Mode) { // turn on-off DialogModes in PS -- don't want to see the open file dialog while the script is running
     var bt = new BridgeTalk;
     bt.target = "photoshop";
     var myScript = "app.displayDialogs = DialogModes." + Mode + ";";
     bt.body = myScript;
     bt.send();
function UpdateAllOutdatedLinks() {
     for (var myCounter = myDoc.links.length-1; myCounter >= 0; myCounter--) {
          var myLink = myDoc.links[myCounter];
          if (myLink.status == LinkStatus.linkOutOfDate) {
               myLink.update();
function GetFileNameOnly(myFileName) {
     var myString = "";
     var myResult = myFileName.lastIndexOf(".");
     if (myResult == -1) {
          myString = myFileName;
     else {
          myString = myFileName.substr(0, myResult);
     return myString;
Thank you.
Yulia

Answer 1

On first sight:
myJPGSaveOptions.interlaced = false;
JPEG save options don't have an 'interlaced' property; that was for PNGs only. Check Photoshop's Script Help for the specific JPEG options.