Countdown Timer Using JavaScript

The following JavaScript code is used create countdown timer for one minute.

<html>
  <head>
    <title>CountDown Timer</title>
  </head>
  <body>
  <div style="font-family:'Courier New'; font-size: 16px; text-align: center;">
    Remaining Time <span id="TimerZone"></span>
  </div>
  <script type="text/javascript">
    var mins=01, secs=00;
    document.getElementById('TimerZone').innerHTML = mins+" : "+secs;
    TimeRunner();
    function TimeRunner(){
      if(secs==0){
        mins = mins-1;
        secs = 59;
      }else{
        secs = secs - 1;
      }
      if(mins==0 && secs>30)
        document.getElementById('TimerZone').innerHTML = mins+" : "+secs;
      if(mins==0 && secs<=30)
        document.getElementById('TimerZone').innerHTML = "<font color='red'>"+mins+" : "+secs+"</font>";
      if(mins==0 && secs==0){
        return ;
      }
      setTimeout(TimeRunner,1000);
    }
  </script>
  </body>
</html>
Output
Remaining Time