Why the alert massage return twice on the screen?

Question

Hi, everyone
I got this script:
var
  mySelected = Number( app.extractLabel("mDialog") ),
  myDialog = app.dialogs.add({name:"Colse files save \"Yes\" or \"No\"",canCancel:true});
  with(myDialog){
       with(dialogColumns.add()){
            with(dialogRows.add()){
                 var
                 mySelection = dropdowns.add({stringList:["01   Yes", "02   No", "03   Reverse"], selectedIndex: 0});
if (myDialog.show() == true)
    main();
myDialog.destroy();
function main(){
      colse_file();
function colse_file(){
    if (mySelection.selectedIndex == 0){
var docs = app.documents;
    for (var i = docs.length-1; i >= 0; i--) {
        docs[i].close(SaveOptions.YES);
alert("Done.\rAll files are saved.");
    if (mySelection.selectedIndex == 1){
    var docs = app.documents;
    for (var i = docs.length-1; i >= 0; i--) {
        docs[i].close(SaveOptions.NO);
alert("Done.\rAll files are closed without save.");
   if (mySelection.selectedIndex == 2){
var docs = app.documents;
app.scriptPreferences.userInteractionLevel = UserInteractionLevels.neverInteract;
app.documents.everyItem().revert();
app.scriptPreferences.userInteractionLevel = UserInteractionLevels.interactWithAll;
alert("Done.\rAll files are reversed.");
Why the alert massage return twice on the screen?
VK

Answer 1

Hi, Chinna
I changed it into this:
var
  mySelected = Number( app.extractLabel("mDialog") ),
  myDialog = app.dialogs.add({name:"Colse files save \"Yes\" or \"No\"",canCancel:true});
  with(myDialog){
       with(dialogColumns.add()){
            with(dialogRows.add()){
                 var
                 mySelection = dropdowns.add({stringList:["01   Yes", "02   No", "03   Reverse"], selectedIndex: 0});
if (myDialog.show() == true)
    main();
myDialog.destroy();
function main(){
      colse_file();
function colse_file(){
    if (mySelection.selectedIndex == 0){
var docs = app.documents;
    for (var i = docs.length-1; i >= 0; i--) {
        docs[i].close(SaveOptions.YES);
alert("Done.\rAll files are saved.");
    if (mySelection.selectedIndex == 1){
    var docs = app.documents;
    for (var i = docs.length-1; i >= 0; i--) {
        docs[i].close(SaveOptions.NO);
alert("Done.\rAll files are closed without save.");
   if (mySelection.selectedIndex == 2){
var docs = app.documents;
app.scriptPreferences.userInteractionLevel = UserInteractionLevels.neverInteract;
app.documents.everyItem().revert();
app.scriptPreferences.userInteractionLevel = UserInteractionLevels.interactWithAll;
alert("Done.\rAll files are reversed.");
but I still got twice
VK