ActionScript 3.0 :: Add Second Parameter To Flashvar?

We need a second parameter added that sets the destination/target for the link. The default/current is _blank but we also need to be able to set this to nothing so it opens in the same window. Can you try adding the second parameter to the flashvars list and use this to set the target for the link.

my html is:

<object width="296" height="88">
<param name="movie" value="../soccer_homepage_AM2.swf" />
<param name="FlashVars" value="url=/mainpage_gif.html" />

[code]....

How to I add that second parameter of opening in same window to the flashvar?I believe you separate the additional one by using a & but am unsure exactly what to put?Do I also have to change the ActionScript in the original fla file? This is set to _blank but I believe they want it to stay that way but have the option of adding _self or whatever it needs to be in the Flashvar when needed.

My ActionScript 3.0 is:

btnLink.addEventListener(MouseEvent.CLICK, buttonSymbol_click);
function buttonSymbol_click(evt:MouseEvent):void {
var req:URLRequest = new URLRequest(stage.loaderInfo.parameters["url"]);
navigateToURL(req, "_blank");
}