title: Set date for countdown timer
body: <p>I need to set countdown timer on my website. I have a deadline date and now the timer needs to countdown till that date.</p>
  
  <p>My current code is:</p>
  
  <pre><code>  &lt;script&gt;
                      function getTimeRemaining(endtime) {
                var t = Date.parse(endtime) - Date.parse(new Date());
                var seconds = Math.floor((t / 1000) % 60);
                var minutes = Math.floor((t / 1000 / 60) % 60);
                var hours = Math.floor((t / (1000 * 60 * 60)) % 24);
                var days = Math.floor(t / (1000 * 60 * 60 * 24));
                return {
                  'total': t,
                  'days': days,
                  'hours': hours,
                  'minutes': minutes,
                  'seconds': seconds
                };
              }
  
              function initializeClock(id, endtime) {
                var clock = document.getElementById(id);
                var daysSpan = clock.querySelector('.days');
                var hoursSpan = clock.querySelector('.hours');
                var minutesSpan = clock.querySelector('.minutes');
                var secondsSpan = clock.querySelector('.seconds');
  
                function updateClock() {
                  var t = getTimeRemaining(endtime);
  
                  daysSpan.innerHTML = t.days;
                  hoursSpan.innerHTML = ('0' + t.hours).slice(-2);
                  minutesSpan.innerHTML = ('0' + t.minutes).slice(-2);
                  secondsSpan.innerHTML = ('0' + t.seconds).slice(-2);
  
                  if (t.total &lt;= 0) {
                    clearInterval(timeinterval);
                  }
                }
  
                updateClock();
                var timeinterval = setInterval(updateClock, 1000);
              }
  
              var deadline = new Date(Date.parse(new Date()) + 15 * 24 * 60 * 60 * 1000);
              initializeClock('clockdiv', deadline);
          &lt;/script&gt;
  </code></pre>
  
  <p>With this code, every time I visit my website, the timer starts to countdown from "15days".</p>