var myCountdown=new Array();
var repeat=false;


function checkPlural(noun,value) {
noun=((value==1)||(value==0))?noun:(noun +="s");return noun;
}


function updateDisplay(text,id)
{
var tag=document.getElementById(id);if(tag.firstChild){
tag.firstChild.nodeValue=text;}

else 
{
textNode=document.createTextNode(text);tag.appendChild(textNode);}return;
}

function doCountdown()
{
for(i=0;i < myCountdown.length;i++)
{
if(!myCountdown[i].expired)
{
var currentDate=new Date();

var eventDate=myCountdown[i].eventDate;

var timeLeft=new Date();

timeLeft=eventDate-currentDate;

msPerDay=24*60*60*1000;
msPerHour=60*60*1000;

msPerMin=60*1000;

msPerSec=1000;

daysLeft=Math.floor(timeLeft/msPerDay);

hoursLeft=Math.floor((timeLeft%msPerDay)/msPerHour);

minsLeft=Math.floor(((timeLeft%msPerDay)%msPerHour)/msPerMin);

secsLeft=Math.floor((((timeLeft%msPerDay)%msPerHour)%msPerMin)/msPerSec);

day=checkPlural("day",daysLeft);

hour=checkPlural("hour",hoursLeft);

minute=checkPlural("minute",minsLeft);

second=checkPlural("second",secsLeft);

if((daysLeft==0)&&(hoursLeft==0)&&(minsLeft==0)&&(secsLeft==0))
{
updateDisplay(myCountdown[i].onevent,myCountdown[i].tagID);}

else 
{
if(daysLeft <=-1)
{
updateDisplay(myCountdown[i].afterevent,myCountdown[i].tagID);myCountdown[i].expired=true;}

else 
{
updateDisplay(daysLeft+" "+day+" "+hoursLeft+" "+hour +
 " "+minsLeft+" "+minute+",and " +
 secsLeft+" "+second+" left until "+myCountdown[i].event,myCountdown[i].tagID);

repeat=true;}}}}if(repeat)
{
repeat=false;window.setTimeout("doCountdown()",1000);}else {
return;}
}


function setEventDate(year,month,day,hour,minute,second){
this.eventDate=new Date(year,month-1,day,hour,minute,second);return;
}


function addCountdown(countdown){
myCountdown[myCountdown.length]=countdown;return;
}


function Countdown()
{
this.tagID="";this.eventDate=new Date();this.setEventDate=setEventDate;this.event="";this.onevent="";this.afterevent="";this.expired=false;
}