Paste in place to next Master unfunction, can you fix it?

Question

Hi, everyone
I got this script, which copy from:
Paste In Place to Specify Master Page
I change it into:
var myDialog = app.dialogs.add({name:"Copy Select item to next Master",canCancel:true});
with(myDialog){
    with(dialogColumns.add()){
    staticTexts.add({staticLabel:"Select a Master you want to copy to"});
        with(dialogRows.add()){
           var mySelection = dropdowns.add({stringList:["Master A", "Master B","Master C", "Master D", "Master E","Master F", "Master G"], selectedIndex:0});
if (myDialog.show() == true)
function main(){
  if("Copy to next Master");
      copy_to_next_master(); 
function copy_to_next_master() { 
    if (mySelection.selectedIndex == 0){
var nSel = app.selection.length;   
for ( var i = 1; i < app.documents.length; i++) {   
        var nextDoc = app.documents[i];   
        if (!nSel) { alert( "Nothing selected!" ); exit(); } 
        for ( var n = 0; n < nSel; n++ ) { 
            var curSel = app.selection[n]; 
            curSel.duplicate( nextDoc.masterSpreads[0] ); 
alert("Done.\rWhat you select are pasted in place to next documents' Master  A");
    if (mySelection.selectedIndex == 1){
var nSel = app.selection.length;   
for ( var i = 1; i < app.documents.length; i++) {   
        var nextDoc = app.documents[i];   
        if (!nSel) { alert( "Nothing selected!" ); exit(); } 
        for ( var n = 0; n < nSel; n++ ) { 
            var curSel = app.selection[n]; 
            curSel.duplicate( nextDoc.masterSpreads[1] ); 
alert("Done.\rWhat you select are pasted in place to next documents' Master  B");
    if (mySelection.selectedIndex == 1){
var nSel = app.selection.length;   
for ( var i = 1; i < app.documents.length; i++) {   
        var nextDoc = app.documents[i];   
        if (!nSel) { alert( "Nothing selected!" ); exit(); } 
        for ( var n = 0; n < nSel; n++ ) { 
            var curSel = app.selection[n]; 
            curSel.duplicate( nextDoc.masterSpreads[2] ); 
alert("Done.\rWhat you select are pasted in place to next documents' Master  C");
    if (mySelection.selectedIndex == 1){
var nSel = app.selection.length;   
for ( var i = 1; i < app.documents.length; i++) {   
        var nextDoc = app.documents[i];   
        if (!nSel) { alert( "Nothing selected!" ); exit(); } 
        for ( var n = 0; n < nSel; n++ ) { 
            var curSel = app.selection[n]; 
            curSel.duplicate( nextDoc.masterSpreads[3] ); 
alert("Done.\rWhat you select are pasted in place to next documents' Master  D");
    if (mySelection.selectedIndex == 1){
var nSel = app.selection.length;   
for ( var i = 1; i < app.documents.length; i++) {   
        var nextDoc = app.documents[i];   
        if (!nSel) { alert( "Nothing selected!" ); exit(); } 
        for ( var n = 0; n < nSel; n++ ) { 
            var curSel = app.selection[n]; 
            curSel.duplicate( nextDoc.masterSpreads[4] ); 
alert("Done.\rWhat you select are pasted in place to next documents' Master  E");
    if (mySelection.selectedIndex == 1){
var nSel = app.selection.length;   
for ( var i = 1; i < app.documents.length; i++) {   
        var nextDoc = app.documents[i];   
        if (!nSel) { alert( "Nothing selected!" ); exit(); } 
        for ( var n = 0; n < nSel; n++ ) { 
            var curSel = app.selection[n]; 
            curSel.duplicate( nextDoc.masterSpreads[5] ); 
alert("Done.\rWhat you select are pasted in place to next documents' Master  F");
    if (mySelection.selectedIndex == 1){
var nSel = app.selection.length;   
for ( var i = 1; i < app.documents.length; i++) {   
        var nextDoc = app.documents[i];   
        if (!nSel) { alert( "Nothing selected!" ); exit(); } 
        for ( var n = 0; n < nSel; n++ ) { 
            var curSel = app.selection[n]; 
            curSel.duplicate( nextDoc.masterSpreads[6] ); 
alert("Done.\rWhat you select are pasted in place to next documents' Master G");
but unfunction, can you fix it?
thanks
Teetan

Answer 1

Hi,
Modifying your code - notice that function main() suppose to be
1. defined and
2. called
Compare it to this code:
#target  indesign
var
  myDialog = app.dialogs.add({name:"Copy Selected item(s) to chosen Master",canCancel:true}),
  mStringList = ["Master A", "Master B","Master C", "Master D", "Master E","Master F", "Master G"];
with(myDialog){
  with(dialogColumns.add()){
  staticTexts.add({staticLabel:"Select a Master you want to copy to"});
  with(dialogRows.add()){
  var mySelection = dropdowns.add({stringList:mStringList, selectedIndex:0});
main();
function main(){
  if (!app.documents.length || !app.selection.length)
  alert( "Nothing selected!" );
  exit();
  if (myDialog.show() == true)
  copy_to_next_master();
function copy_to_next_master() {
var
  mChoice = mySelection.selectedIndex,
  mMsg = "Done.\rWhat you select is pasted in place to next documents - " + mStringList[mChoice],
  nSel = app.selection.length,
  mDone = false,
  i,n,nextDoc,curSel;  
for ( i = 1; i < app.documents.length; i++) {  
  nextDoc = app.documents[i];  
  targetMaster = nextDoc.masterSpreads[mChoice];
  if (!targetMaster.isValid) {
  mMsg += "\rCan't detect " + mStringList[mChoice] + " in a doc: " + nextDoc.name;
  continue;
  mDone = true;
  for ( n = 0; n < nSel; n++ ) {
  curSel = app.selection[n];
  curSel.duplicate( nextDoc.masterSpreads[mChoice] );
mDone ? alert(mMsg) : alert("Nothing copied");
Jarek