function setcountdown(theyear,themonth,theday){ 
yr=theyear;mo=themonth;da=theday 
} 

setcountdown(2012,1,23) 

var occasion="Tết Nguyên Đán 2012." 
var message_on_occasion="Chúc mừng năm mới!" 

var countdownwidth='480px' 
var countdownheight='20px' 
var countdownbgcolor='lightblack' 
var opentags='<font face="Verdana">' 
var closetags='</font>' 
var montharray=new Array("Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec") 
var crosscount='' 

function start_countdown(){ 
if (document.layers) 
document.countdownnsmain.visibility="show" 
else if (document.all||document.getElementById) 
crosscount=document.getElementById&&!document.all?document.getElementById("countdownie") : countdownie 
countdown() 
} 

if (document.all||document.getElementById) 
document.write('<span id="countdownie" style="width:'+countdownwidth+'; background-color:'+countdownbgcolor+'"></span>') 

window.onload=start_countdown 


function countdown(){ 
var today=new Date() 
var todayy=today.getYear() 
if (todayy < 1000) 
todayy+=1900 
var todaym=today.getMonth() 
var todayd=today.getDate() 
var todayh=today.getHours() 
var todaymin=today.getMinutes() 
var todaysec=today.getSeconds() 
var todaystring=montharray[todaym]+" "+todayd+", "+todayy+" "+todayh+":"+todaymin+":"+todaysec 
futurestring=montharray[mo-1]+" "+da+", "+yr 
dd=Date.parse(futurestring)-Date.parse(todaystring) 
dday=Math.floor(dd/(60*60*1000*24)*1) 
dhour=Math.floor((dd%(60*60*1000*24))/(60*60*1000)*1) 
dmin=Math.floor(((dd%(60*60*1000*24))%(60*60*1000))/(60*1000)*1) 
dsec=Math.floor((((dd%(60*60*1000*24))%(60*60*1000))%(60*1000))/1000*1) 
//if on day of occasion 
if(dday<=0&&dhour<=0&&dmin<=0&&dsec<=1&&todayd==da){ 
if (document.layers){ 
document.countdownnsmain.document.countdownnssub.document.write(opentags+message_on_occasion+closetags) 
document.countdownnsmain.document.countdownnssub.document.close() 
} 
else if (document.all||document.getElementById) 
crosscount.innerHTML=opentags+message_on_occasion+closetags 
return 
} 
//if passed day of occasion 
else if (dday<=-1){ 
if (document.layers){ 
document.countdownnsmain.document.countdownnssub.document.write(opentags+"Occasion already passed! "+closetags) 
document.countdownnsmain.document.countdownnssub.document.close() 
} 
else if (document.all||document.getElementById) 
crosscount.innerHTML=opentags+"Occasion already passed! "+closetags 
return 
} 
//else, if not yet 
else{ 
if (document.layers){ 
document.countdownnsmain.document.countdownnssub.document.write(opentags+dday+ " days, "+dhour+" hours, "+dmin+" minutes, and "+dsec+" seconds left until "+occasion+closetags) 
document.countdownnsmain.document.countdownnssub.document.close() 
} 
else if (document.all||document.getElementById) 
crosscount.innerHTML="Chỉ còn " +opentags+dday+ " ngày "+dhour+" giờ "+dmin+" phút "+dsec+" gây nữa lá đến  "+occasion+closetags 
} 
setTimeout("countdown()",1000) 
}