HTMLLoader js errors

Question

I am using Flash CS3 and adobe air and when i create a htmlloader
main.as
package {
   import flash.display.NativeWindow;
   import flash.display.Sprite;
   import flash.display.Stage;
   import flash.display.StageAlign;
   import flash.display.StageScaleMode;
   import flash.events.Event;
   import flash.html.HTMLLoader;
   import flash.net.URLLoader;
   import flash.net.URLRequest;
   public class main extends Sprite
   private var mainWindow:NativeWindow;
   private var htmlwebsite:HTMLLoader;
   public function main(){
  htmlwebsite = new HTMLLoader();
  htmlwebsite.addEventListener(Event.COMPLETE, completewebsiteHandler);
   var websiteurlReq:URLRequest = new URLRequest("http://www.kfc.com");
  htmlwebsite.load(websiteurlReq);
   function completewebsiteHandler(e:Event) {
  trace(htmlwebsite.window.document.getElementsByTagName("a")[0].getAttribute("href"));
I get this error
TypeError: Value undefined (result of expression document.querySelectorAll) is not object.
at http://platform.vine.co/static/scripts/embed.js : 21
at http://platform.vine.co/static/scripts/embed.js : 21
at http://platform.vine.co/static/scripts/embed.js : 21
I can see the line in the html, how can I remove the line from the html or stop the error from displaying and continue the code execution?

Answer 1

when i add this it says cancelable = true how to cancel the error
htmlwebsite.addEventListener(HTMLUncaughtScriptExceptionEvent.UNCAUGHT_SCRIPT_EXCEPTION, cata);
function cata(e:HTMLUncaughtScriptExceptionEvent) {
                                trace(e.exceptionValue);