var timerID=null
var timing=false

function stoptime()
{
if(timing)
clearTimeout(timerID)
timing=false
}
function starttime()
{
stoptime()
showtime()
}
function showtime()
  {
  var mytime=new Date()
  var hours=mytime.getHours()
  var minutes=mytime.getMinutes()
  var seconds=mytime.getSeconds()
  var timevalue=""+hours
    timevalue +=((minutes<10) ? ":0":":")+minutes
    timevalue +=((seconds<10) ? ":0":":")+seconds+"  "
    timevalue +=(hours>=12) ? "P.M.":"A.M."
        document.mytime.time1.value=timevalue
        timerID=setTimeout("showtime()",1000)
        timing=true
}