import flash.events.TimerEvent;
import flash.utils.Timer;

private var newsIndex:int;
private	var newsTimer:Timer;

private function setNewsTimer():void {
	newsTimer = new Timer(10000);
   	newsTimer.addEventListener(TimerEvent.TIMER, onNewsTimer);
}

private function onNewsTimer(event:TimerEvent):void {
	newsIndex = newsIndex + 1;
	if(newsIndex == news.length) { 
		newsIndex = 0;
	}	
	lbTitle.text = news[newsIndex].title;
	txDescription.htmlText = news[newsIndex].description;
	lbFirm.text = "by " + news[newsIndex].name + " on " + news[newsIndex].inserted;
}