Javascript to Flash communication and vise versa

The communication between Flash and JavaScript is really important part of the web sites today. That's why I decided to share how to do it.
In the example here I made two areas. The left one contains Flash text form and the other one HTML based text area. By clicking on the buttons the text of the boxes is transferred between each other. Here is the HTML code:

The ActionScript code:

Download the whole example from here.