nedd help getting count down timer to stop

Can anyone help with this code it code i want it to stop at the year 1900



var count:int = 2013;

var myTimer:Timer = new Timer(100,count);

myTimer.addEventListener(TimerEvent.TIMER, countdown);
myTimer.addEventListener(TimerEvent.TIMER_COMPLETE , endTimer);

myTimer.start();
trace("timer started");
function countdown(e:TimerEvent):void{
myText_txt.text = String((count)-myTimer.currentCount);



if(myText_txt.text == "1900"){
myTimer.removeEventListener(Event.ENTER_FRAME, countDown);
}
// gotoAndStop(2)
trace("timer ended");

}
//count--;

function endTimer(e:TimerEvent):void{

//trace("timer ended");
}

Code:

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var count:int = 2013;
var myTimer:Timer = new Timer(100,count);
myTimer.addEventListener(TimerEvent.TIMER, countdown);
myTimer.start();

function countdown(e:TimerEvent):void {
        myText_txt.text = String((count)-myTimer.currentCount);
        if (myText_txt.text == "1900") {
                myTimer.stop();
        }
}

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