Sunday, November 4, 2007

JavaScript Count Up Timer with Source Code using Interval() Method

Try this count up timer.

00:00:00:000

The source code is like below:

<script language="javascript">
   var myInterval;
   var count = 0;
   var startTime;

   function startStopCountUp()
   {
      if (document.getElementById("btnReset").style.display == 'none')
      {
         document.getElementById("btnReset").style.display = '';
      }
      if (document.getElementById("btnCountUp").value == "Pause")
      {
         StopCountUp();
         document.getElementById("btnCountUp").value = "Resume";
      }
      else
      {
         startTime = new Date();
         myInterval = window.setInterval('StartCountUp()',333);
         document.getElementById("btnCountUp").value = "Pause";  
      }  
   }
  
   function StartCountUp()
   {
      var myDate = new Date();
      count = myDate - startTime + count;
      startTime = myDate;
  
      spanTimer.innerHTML = showDiffTime(count);
   }
 
   function StopCountUp()
   {
      window.clearInterval(myInterval);
   }
 
   function ResetCountUp()
   {
      StopCountUp();
      document.getElementById("btnCountUp").value = "Start";  
      document.getElementById("btnReset").style.display = 'none';
      count = 0;
      spanTimer.innerHTML = '0';
   }

   function showDiffTime(diffTime)
   {
      var miliseconds = diffTime % 1000;
      var scratch = Math.floor((diffTime - miliseconds) / 1000);
      var seconds = scratch % 60;
      scratch = Math.floor((scratch - seconds) / 60);
      var minutes = scratch % 60;
      scratch = Math.floor((scratch - minutes) / 60);
      var hours = scratch % 24;
      scratch = Math.floor((scratch - hours) / 24);
      var days = scratch;
  
      var displayDiffTime = ""
  
      if (days > 0)
         displayDiffTime += days + ' days, ';
   
      if (hours > 9)
         displayDiffTime += hours + ':';
      else
         displayDiffTime += '0' + hours + ':';
   
      if (minutes > 9)
         displayDiffTime += minutes + ':';
      else
         displayDiffTime += '0' + minutes + ':'; 
  
      if (seconds > 9)
         displayDiffTime += seconds + ':';
      else
         displayDiffTime += '0' + seconds + ':'; 
   
      if (miliseconds > 99)
         displayDiffTime += miliseconds;
      else if (miliseconds > 9)
         displayDiffTime += '0' + miliseconds;
      else
         displayDiffTime += '00' + miliseconds;   
      return displayDiffTime;
   }
</script>

<input type="button" name="btnCountUp" value="Start" onClick="startStopCountUp();" ID="btnCountUp">
<input type="button" name="btnReset" value="Reset" onClick="ResetCountUp();" ID="btnReset" style="DISPLAY:none">
<span id="spanTimer" style="font-size: 20px; color: orange;">00:00:00:000</span>

Posted by bm_boy at 8:16:00 PM

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