Editing .txt files inside flash

Question

Right now, I have it set up so that each button on my flash will open up a .txt file. I want to have it set up so that the user can not only read the txt file but edit it and save it to the original .txt file. My current code looks like this:
dMemo.addEventListener(MouseEvent.CLICK,displayD);
lMemo.addEventListener(MouseEvent.CLICK,displayL);
function displayD(e:Event):void{
txtloader.load(new URLRequest("design_vocab.txt"));
function displayL(e:Event):void{
txtloader.load(new URLRequest("logo_design_tips.txt"));
var file:URLRequest = new URLRequest("instructions.txt");
var txtloader:URLLoader = new URLLoader();
txtloader.addEventListener(Event.COMPLETE, loadtxt);
txtloader.load(file);
function loadtxt(event:Event):void{
memotext.text = txtloader.data;

Answer 1

you should use the filereference class to load and save text files that you want to edit:
var s:String;
var fref_load:FileReference = new FileReference();
var fref_save:FileReference = new FileReference();
fref_load.addEventListener(Event.COMPLETE, loadcompleteF);
fref_load.addEventListener(Event.SELECT, selectF);
fref_load.browse([new FileFilter("Text", "*.txt")]);
function selectF(e:Event):void {
    fref_load.load();
function loadcompleteF(e:Event):void {
    s = e.target.data;
    // now edit the string s and when you want to save the updated text, call saveF();
function saveF():void {
    fref_save.save(s,fref_load.name);