Timing function for countdown timer

// import flash common system classes
import flash.desktop.*;
import flash.net.*;
import flash.display.*;
import flash.events.*;
import flash.system.Capabilities;
import fl.transitions.*;
import fl.transitions.easing.*;
import flash.text.*;
import flash.display.Sprite;
 
// Create Variables and data type them to store application end Date
var myYear:Number;
var myMonth:Number;
var myDay:Number;
 
//Create user variables to store user inputs
var userYear:String;
var userMonth:String;
var userDay:String;
 
// Give application varibales initial values
myYear = 2009;
myMonth = 6;
myDay = 2;
 
// As Jan is referenced in AS as 0 -1 from the actual month number;
myMonth = myMonth -1;
 
//Assign a new Date variable with the target date initially set.
var endDate:Date = new Date(myYear,myMonth,myDay);
trace (endDate);
 
//create time with a delay of 1 second
var countdownTimer:Timer = new Timer(1000);
countdownTimer.addEventListener(TimerEvent.TIMER, updateTime);
countdownTimer.start();
 
//Update timer function fired every second
function updateTime(e:TimerEvent):void
{
	var now:Date = new Date();
	var timeLeft:Number = endDate.getTime() - now.getTime();
	var seconds:Number = Math.floor(timeLeft / 1000);
	var minutes:Number = Math.floor(seconds / 60);
	var hours:Number = Math.floor(minutes / 60);
	var days:Number = Math.floor(hours / 24);
	
	seconds %= 60;
	minutes %= 60;
	hours %= 24;
	
	var sec:String = seconds.toString();
	var min:String = minutes.toString();
	var hrs:String = hours.toString();
	var d:String = days.toString();
	
	if(sec.length < 2) {
		sec = "0" + sec;
	}
	if(min.length < 2) {
		min = "0" + min;
	}
	if(hrs.length < 2) {
		hrs = "0" + hrs;
	}
	if(d.length == 2) {
		d = "0" + d;
	}
	if(d.length == 1) {
		d = "00" + d;
	}
	var time:String = d + ":" + hrs + ":" + min + ":" + sec;
	
	countDown_mc.time_txt.text = time;
}
 
//create event listener
background_mc.addEventListener(MouseEvent.MOUSE_DOWN, back_CLICK);
close_btn.addEventListener(MouseEvent.CLICK, closeButton_CLICK);
settings_btn.addEventListener(MouseEvent.CLICK, settingsbtn_CLICK);
settings_mc.ok_btn.addEventListener(MouseEvent.CLICK, okbtn_CLICK);
settings_mc.cancel_btn.addEventListener(MouseEvent.CLICK, cancelbtn_CLICK);
 
//***** ASSIGN FUNCTIONS ******
//function to action when back MC listener is activated
function back_CLICK(e:MouseEvent):void
{
	stage.nativeWindow.startMove();
}
 
//function to action when the close button listener is activated
function closeButton_CLICK(e:MouseEvent):void
{
	NativeApplication.nativeApplication.exit();
}
 
//Set function for click event on settings button
function settingsbtn_CLICK(e:MouseEvent):void
{
	//Setup an alpha tween on the timer display
	var clockAlphaTween1:Tween = new Tween(countDown_mc, "alpha", Strong.easeOut, 1,0,2,true);
	//Listen for when the tween has finished and then run function
	clockAlphaTween1.addEventListener(TweenEvent.MOTION_FINISH, clockAlphaTween1_FINISH);
}
 
//Function for when alpha tween above is finished
function clockAlphaTween1_FINISH(e:TweenEvent):void
{
	//Setup an alpha tween for the settings mc
	var settingsAlphaTween1:Tween = new Tween(settings_mc, "alpha",Strong.easeOut, 0,1,2,true);
	//Setup a motion tween on the x axis for settings mc
	var settingsXTween1:Tween = new Tween(settings_mc, "x",Strong.easeOut, 416, 96, 2,true);
}
 
//Set function for click event for the cancel button
function cancelbtn_CLICK(e:MouseEvent):void
{
	//Setup an alpha tween on the settings mc
	var settingsAlphaTween2:Tween = new Tween(settings_mc, "alpha",Strong.easeOut, 1,0,2,true);
	//Setup a motion tween on the x axis for setting mc
	var settingsXTween2:Tween = new Tween(settings_mc, "x",Strong.easeOut, 96, 416, 2,true);
	//Listen for when the tween above has finished then run function
	settingsXTween2.addEventListener(TweenEvent.MOTION_FINISH, settingsXTween2_FINISH);
}
 
//Function for when motion tween has finished
function settingsXTween2_FINISH(e:TweenEvent):void
{
	//Setup alpha tween for timer display
	var clockAlphaTween2:Tween = new Tween(countDown_mc, "alpha", Strong.easeOut, 0,1,2,true);
}
 
//Set function for click event on ok button
function okbtn_CLICK(e:MouseEvent):void
{
	//Assign user inputed values to variables
	userYear = settings_mc.yearInput_txt.text;
	userMonth = settings_mc.monthInput_txt.text;
	userDay = settings_mc.dayInput_txt.text;
	
	//Convert string values to number data type and replace app variables with these values
	myYear = Number(userYear);
	myMonth = Number(userMonth)-1;
	myDay = Number(userDay);
	
	//Close the settings mc with alpha and motion tweens
	var settingsAlphaTween3:Tween = new Tween(settings_mc, "alpha",Strong.easeOut, 1,0,2,true);
	var settingsXTween3:Tween = new Tween(settings_mc, "x",Strong.easeOut, 96, 416, 2,true);
	//Listen for when motion tween has finished and run function
	settingsXTween3.addEventListener(TweenEvent.MOTION_FINISH, settingsXTween3_FINISH);
}
 
//Function for when motion tween has finished
function settingsXTween3_FINISH(e:TweenEvent):void
{
	//Run functions
	clearSettings();
	applyNewTimer();	
	//Setup motion tween on x axis for timer display
	var clockAlphaTween3:Tween = new Tween(countDown_mc, "alpha", Strong.easeOut, 0,1,2,true);
}
 
//Function to clear the setting input fields
function clearSettings()
{
	settings_mc.yearInput_txt.text = "";
	settings_mc.monthInput_txt.text = "";
	settings_mc.dayInput_txt.text = "";
}
 
//Function to assign new endDate with new user values.
function applyNewTimer()
{
	var endDate:Date = new Date(myYear,myMonth,myDay);
	trace (endDate);
}