javascript: indesign get library index dialog

gistfile1

function get_lib_index_dialog() {
	// v 0.1.2 tested.
	var library_name = "";
	var all_library_names = [];
	var my_index = -1;
	for (var i = 0, len = app.libraries.length; i<len;i++) {		
		all_library_names.push(remove_file_extension(app.libraries[i].name).toUpperCase());
	};
	if(all_library_names.length ===1){return 0;}
	if(all_library_names.length>1) {
		var my_dialog = app.dialogs.add({name: "Select Library to import artworks:", canCancel:true});
		with(my_dialog.dialogColumns.add()){
			with(dialogRows.add()){
				with(dialogColumns.add()){
					staticTexts.add({staticLabel:"Library Name: "});
				};		
				with(dialogColumns.add()){			
					var my_dropdown = dropdowns.add({stringList:all_library_names, selectedIndex:0});
				};	
	        };
		};

		var defaultScriptPreference = app.scriptPreferences.userInteractionLevel;
		app.scriptPreferences.userInteractionLevel = UserInteractionLevels.INTERACT_WITH_ALL;
	    var myResult = my_dialog.show();	    
		app.scriptPreferences.userInteractionLevel = defaultScriptPreference;	
	    if(myResult == true) {
	    	my_index = my_dropdown.selectedIndex;
			my_dialog.destroy();		
			return my_index;
		}else{		
			my_dialog.destroy();
			return -1;	
		};
	};	
};