Read text with actionscript

Question

I have been looking all around for this answer but I never
really found the exact answer I'm looking for.... I need something
that would read a .txt file and compare it to a variable containing
a .txt file (already loaded), and if it is the same then it will do
an action.
My case is that I have 1 file for each language (3 languages)
containing the same information but in a different language. And I
would like to check what language is already loaded, so that it
knows what language file it should load in the variable when
someone presses a button in the nav bar.
I hope I'm clear enough. Please let me know if you know or if
you need me to find a better way to say this.
Thanks you.

Answer 1

Sorry. Tried writing the code for you very late last night.
Now that I am a bit more awake, here are step by step instructions
to create a small version of what I am talking about. You will have
to modify it to fit your exact situation.
1) create a new flash file and save it on the hard-drive.
2) Create a new text file inside notepad or equivalent
program.
3) In this file, write content=Welcome to our home. Save it
as en_welcome.txt, making sure to save it in the same folder as
your flash file.
4) Create another new text file inside notepad.
5) In this file, write content=Bienvenidos a nosotros casa.
Save it as sp_welcome.txt making sure to save it in the same folder
as your flash file.
6) In your new flash file, create a dynamic text field on the
stage. Set the variable field in the options bar to content.
7) Select the text field and create a symbol out of it. Name
it something you'll remember. Give it an instance name of target_mc
on the Stage.
8) Create a new layer in the main movie for your language
menu. Create two buttons on the stage...one for English and one for
Spanish. Give each a proper instance name, in my code, I'll be
using "english_btn" and "spanish_btn".
9) Add a new layer to the main movie again for your standard
menu. Create a static text field with the word "Welcome" in it.
Select the word welcome and create a symbol out of it named menu
and give it an instance name of menu. Double click the new symbol
on the stage. Select the word welcome and create another symbol out
of it named Welcome and give it an instance name of welcome.
10) Now we start coding