Below are some useful AS3 snippets that I use quite frequently. Thought they might come in handy for you too!
1. Get a url when the button is clicked.

import flash.net.URLRequest;
import flash.net.URLLoader;
import flash.events.*;
// ADD EVENT LISTENER AND FUNCTION TO THE BUTTON
button_name.addEventListener(MouseEvent.CLICK, go);
function go(event:MouseEvent):void {
var url:String = “http://www.yourdomain.com”;
var request:URLRequest = new URLRequest(url);
navigateToURL(request, [...]