Copy keywords into title field, keep in keywords field

Question

I have this script that works in cs5, but it is not working in CS6- I am going to try to modify it to copy the keywords into the title field, but also drop the ";" and replace with a ","
First, I can't get CS6 to run this code, though. Where is it wrong? Thank you for any suggestions-
#target bridge  
if( BridgeTalk.appName == "bridge" ) { 
keysToDesc = MenuElement.create("command", "Keywords To Description", "at the end of Tools");
keysToDesc.onSelect = function () {
   keysToDesc();
function keysToDesc(){
    function getArrayItems(ns, prop){
var arrItem=[];
var items = myXmp.countArrayItems(ns, prop);
   for(var i = 1;i <= items;i++){
     arrItem.push(myXmp.getArrayItem(ns, prop, i));
return arrItem.toString();
if (ExternalObject.AdobeXMPScript == undefined) ExternalObject.AdobeXMPScript = new ExternalObject("lib:AdobeXMPScript");
var thumb = app.document.selections;
    for(var s in thumb){
if(thumb[s].hasMetadata){
        var selectedFile = thumb[s].spec;
  var myXmpFile = new XMPFile( selectedFile.fsName, XMPConst.UNKNOWN, XMPConst.OPEN_FOR_UPDATE);
  var myXmp = myXmpFile.getXMP();
        var Keywords = getArrayItems(XMPConst.NS_DC,'subject').replace(/,/g,';')
         myXmp.deleteProperty(XMPConst.NS_DC, "description");
        myXmp.setLocalizedText( XMPConst.NS_DC, "description", null, "x-default", Keywords );
        if (myXmpFile.canPutXMP(myXmp)) {
        myXmpFile.putXMP(myXmp);
        myXmpFile.closeFile(XMPConst.CLOSE_UPDATE_SAFELY);
         } else {
  xmpFile.closeFile();

Answer 1

There was no need to make a change as it extracts an array and this is converted to a string so that puts the commas inbetween.
A simple replace can add a space ....
#target bridge  
if( BridgeTalk.appName == "bridge" ) { 
keysToTitle = MenuElement.create("command", "Keywords To Title", "at the end of Tools");
keysToTitle.onSelect = function () {
var sels = app.document.selections;
for(var a in sels){
md =sels[a].synchronousMetadata;
md.namespace = "http://ns.adobe.com/photoshop/1.0/";
var Keys =  md.Keywords.toString().replace(/,/g,', ');// Replace a comma with comma space
md.namespace = "http://purl.org/dc/elements/1.1/";
md.title ='';
md.title = Keys;