var timerID = null;
var timerRunning = false;
function stopclock (){
if(timerRunning)
clearTimeout(timerID);
timerRunning = false;}
function startclock () {
stopclock();
showtime();}
function showtime () {
var now = new Date();
var year = now.getYear();
var month = now.getMonth()+1;
var day = now.getDate();
var hours = now.getHours();
var minutes = now.getMinutes();
var seconds = now.getSeconds()
var timeValue =year +"年"
timeValue += month+"月"
timeValue += day+"日 "
timeValue += "" +((hours >= 12) ? "下午 " : "上午 " )
timeValue += ((hours >12) ? hours -12 :hours)
timeValue += ((minutes < 10) ? ":0" : ":") + minutes
timeValue += ((seconds < 10) ? ":0" : ":") + seconds
liveclock.innerHTML=timeValue
timerID = setTimeout("showtime()",1000);
timerRunning = true;}