function startTime(h,m,s)
{
  str=checkTime(h,m,s);
  document.getElementById('cntdwn').innerHTML = str;

  if (s == 0)
  {
    s = 59;
    if ( m > 0)
      m = m - 1;
    else
    {
      m = 59;
      if (h > 0)
        h = h-1;
      else
        h=m=s=0;
    }
  }
  else
    s = s-1;

  var str = "startTime(" + h + "," + m + "," + s + ")";

  t=setTimeout(str,1000);
}

function checkTime(h,m,s)
{
  if (s < 10)
    s = "0" + s;

  if (m < 10)
    m = "0" + m;

  if (h == 0)  
    str = "<b>" + m + ":" + s + "</b>";
  else
    str = "<b>" + h + ":" + m + ":" + s + "</b>";

  return str;
}

document.write("<span id='cntdwn'></span>");

startTime(h,m,s);