Pass string from html inside <object> into Actionscript

I have a flash movie that is being used for several websites. On each site I would like to specify a different XML file inside the markup. How do I grab that string and use it in ActionScript?

in markup i want to do this:

<object ...
   <param name=FlashVars value="urlXML=myXML.xml" />
</object>

in actionscript 3.0, im trying to do this:

var urlXML=_root.urlXML;

Currently when I do this, I get an error in output saying 'access of undefined property...' How am i supposed to grab that string?

From stackoverflow

• Note: Adobe KB article

  FlashVars must be assigned in both the OBJECT and EMBED tags in order to work on all browsers.

• It should just be there--you don't need the _root. See this.

  Armitage : That was in AS2. But I found the solution. I needed this line of code: var urlXML = loaderInfo.parameters.urlXML;

• That isn't how you access FlashVars in AS3. You need the root loaderInfo's parameter property, that houses any FlashVars that were tacked on.

  
  var urlXML: String = root.loaderInfo.parameters.urlXML;
  

  Armitage : this worked for me too: var urlXML = loaderInfo.parameters.urlXML;

• My first response... so here goes:

  I have a small video player application I developed for McGill University Alumni. You can see it here: http://www.alumni.mcgill.ca/esol/holiday/2008/flash.php?giftCode=123456 It picks up a 'Gift Code' from the URL but you can always hard-code your .xml file.

  Here are the object and embed (s) I use:

  <embed src="mcgill_annual_fund200903.swf**?giftCode=<?php echo $giftCode; ?>**" quality="high" pluginspage="http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash" type="application/x-shockwave-flash" width="680" height="550"></embed>
  

  And with the .js embed script:

  <script type="text/javascript">
  

  AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,28,0','width','680','height','550','src','mcgill_annual_fund200903**?giftCode=**','quality','high','pluginspage','http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash','movie','mcgill_annual_fund200903?giftCode=','wmode','transparent' ); //end AC code

  And then to retrieve the info in AS3:

  //get the giftCode
  var gCode:String;
  var giftCode:String;
  function loaderComplete(lEvent:Event){
      gCode = loaderInfo.loaderURL;
      giftCode = gCode.substr((gCode.indexOf("?giftCode=")+10));
      //giftCodeTxt.text= giftCode;
  }