javascript - millisecond countdown/timer seems to pause on zero -

making simple millisecond countdown/timer, here live example using jsfiddle

my issue number 0 displays longer other numbers.

i fluid countdown, suggestions?

js

// how many seconds added counter countdown date.prototype.addseconds= function(s) {     this.setseconds(this.getseconds()+s);     return this; }  // default 60 seconds var end = new date().addseconds(60); // change value seconds wanted count down var _second = 1000; var _minute = _second * 60; var timer;  function getdigit(position, number)  {     numberstring = number + "";     return numberstring.substr (position + 1, 1); }  function showremaining() {     var countdownelement = document.getelementbyid('timer');      var = new date();     var distance = end - now;     var minutes = math.floor( (distance % _minute * 60) / _minute );     var seconds = math.floor( (distance % _minute) / _second );     var milliseconds = distance % _second;     var millisecond = getdigit(1, milliseconds);      if (millisecond <= 0)     {         millisecond = 0;     }      countdownelement.innerhtml = seconds + 's ' + millisecond + 'ms';     //countdownelement.innerhtml = seconds + '.' + milliseconds;      if (milliseconds < 0)      {        countdownelement.innerhtml = 'finished';        clearinterval(timer);      } }  timer = setinterval(showremaining, 10); 

if needed

html

<div id="timer">a</div> 

css

#timer  {     display:inline-block;     padding:3px 5px;     border:1px solid #666;     font-family:tahoma;     color:#999;     font-size:12px; } 

it looks if take string conversion out, pause disappears:

var milliseconds = distance % (_second / 100); 

instead of

var millisecond = getdigit(1, milliseconds); 

http://jsfiddle.net/c3nca/3/