Action Script 3.0

I have a very Stupid Question,

how can i get 2 digit number 

here is my code-

stop();
var total:int = 00;

totaltext.text = total.toString();

opt01.addEventListener(MouseEvent.CLICK, fl_MouseClickHandler);

function fl_MouseClickHandler(event:MouseEvent):void
{
total = total +10;
totaltext.text=total.toString();

opt01.removeEventListener(MouseEvent.CLICK, fl_MouseClickHandler);
}

opt0203.addEventListener(MouseEvent.CLICK, fl_MouseClickHandler_2);

function fl_MouseClickHandler_2(event:MouseEvent):void
{
total = total +10;
totaltext.text=total.toString();

opt0203.removeEventListener(MouseEvent.CLICK, fl_MouseClickHandler_2);
}

next.addEventListener(MouseEvent.CLICK, fl_MouseClickHandler_3);

function fl_MouseClickHandler_3(event:MouseEvent):void
{
if(total == 20)
{
gotoAndStop(2);
}
else
{
trace("RETRY")
}
}