function setcountdown(theyear,themonth,theday){ 

yr=theyear;mo=themonth;da=theday 

} 

setcountdown(2023,1,22) 

var occasion="Tết Nguyên Đán 2023" 

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) 



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+" Chúc Mừng Năm Mới "+closetags) 

document.countdownnsmain.document.countdownnssub.document.close() 

} 

else if (document.all||document.getElementById) 

crosscount.innerHTML=opentags+" Chúc Mừng Năm Mới "+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="<p>"+occasion+closetags+"</p> <span class='w3-tag w3-red w3-padding w3-margin'>" +opentags+dday+ " ngày</span> <span class='w3-tag  w3-red w3-margin w3-padding'> "+dhour+" giờ </span> <span class='w3-tag w3-red w3-margin w3-padding'>"+dmin+" phút</span> <p><span class='w3-tag  w3-red w3-padding'> "+dsec+" giây</span></p> "

$('i#dd').html(opentags+dday);  $('#yy').html(todayy);

} 

setTimeout("countdown()",1000) 

} 

<p id="countdownie"></p>