<mx:HTML id="htmlNews" width="100%" height="100%" visible="false" styleName="main" complete="makeLinks(event);" />

<mx:Script>
    <![CDATA[
    import flash.net.*;
    import flash.html.*;
    import flash.events.Event;

    private function makeLinks(e:Event):void
    {
        var dom:JavaScriptObject = e.currentTarget.javaScriptDocument;
        var links:Object = dom.getElementsByTagName("a");

        for(var i:Number = 0; i < links.length; i++){
            if(links[i].target.toLowerCase() == "_blank"){
                links[i].onclick = clickHandler;
            }
        }
    }

    private function clickHandler(o:JavaScriptObject):void
    {
        navigateToURL(new URLRequest(o.currentTarget.href),"blank");
    }

]]>
</mx:Script>