Cara Membuat Hitung Waktu Mundur/Countdown di Blog

Oke kali ini saya akan ngasih tau cara membuat countdown atau hitung waktu mundur. Biasanya ini digunakan dalam lauching suatu acara, launcing web/blog, dll. Tak perlu basa basi lagi, langsung praktek!

Kamu tinggal copy paste kode di bawah ini saja, letakkan di tempat dimana countdown tersebut akan muncul.

<script language="JavaScript">
TargetDate = "05/26/2099 7:00 AM";
BackColor = "#eeeeee";
ForeColor = "#444444";
CountActive = true;
CountStepper = -1;
LeadingZero = true;
DisplayFormat = "%%D%% Hari, %%H%% Jam, %%M%% Menit, %%S%% Detik.";
FinishMessage = "Waktunya telah tiba!";

function calcage(secs, num1, num2) {
  s = ((Math.floor(secs/num1))%num2).toString();
  if (LeadingZero && s.length < 2)
    s = "0" + s;
  return "<b>" + s + "</b>";
}

function CountBack(secs) {
  if (secs < 0) {
    document.getElementById("cntdwn").innerHTML = FinishMessage;
    return;
  }
  DisplayStr = DisplayFormat.replace(/%%D%%/g, calcage(secs,86400,100000));
  DisplayStr = DisplayStr.replace(/%%H%%/g, calcage(secs,3600,24));
  DisplayStr = DisplayStr.replace(/%%M%%/g, calcage(secs,60,60));
  DisplayStr = DisplayStr.replace(/%%S%%/g, calcage(secs,1,60));

  document.getElementById("cntdwn").innerHTML = DisplayStr;
  if (CountActive)
    setTimeout("CountBack(" + (secs+CountStepper) + ")", SetTimeOutPeriod);
}

function putspan(backcolor, forecolor) {
 document.write("<span id='cntdwn' style='background-color:" + backcolor + 
                "; color:" + forecolor + "'></span>");
}

if (typeof(BackColor)=="undefined")
  BackColor = "white";
if (typeof(ForeColor)=="undefined")
  ForeColor= "black";
if (typeof(TargetDate)=="undefined")
  TargetDate = "12/31/2020 5:00 AM";
if (typeof(DisplayFormat)=="undefined")
  DisplayFormat = "%%D%% Days, %%H%% Hours, %%M%% Minutes, %%S%% Seconds.";
if (typeof(CountActive)=="undefined")
  CountActive = true;
if (typeof(FinishMessage)=="undefined")
  FinishMessage = "";
if (typeof(CountStepper)!="number")
  CountStepper = -1;
if (typeof(LeadingZero)=="undefined")
  LeadingZero = true;


CountStepper = Math.ceil(CountStepper);
if (CountStepper == 0)
  CountActive = false;
var SetTimeOutPeriod = (Math.abs(CountStepper)-1)*1000 + 990;
putspan(BackColor, ForeColor);
var dthen = new Date(TargetDate);
var dnow = new Date();
if(CountStepper>0)
  ddiff = new Date(dnow-dthen);
else
  ddiff = new Date(dthen-dnow);
gsecs = Math.floor(ddiff.valueOf()/1000);
CountBack(gsecs);
</script>

Untuk mengatur kapan waktunya, tinggal edit saja kode yang digaris bawah di atas. Dan untuk mempercantik tampilan kita bisa memanfaatkan #cntdwn. Dengan CSS dibawah ini:

<style type="text/css">
#cntdwn {
font-size:20px;
padding:5px 10px;
-webkit-border-radius:10px;
-moz-border-radius:10px;
border-radius:10px;
}
</style>

Hasilnya seperti ini :






Terima kasih :)