var today=new Date()
var h=today.getHours()
function startTime()
{var today=new Date()
var h=today.getHours()
var m=today.getMinutes()
var s=today.getSeconds()
var day_night
m=checkTime(m)
s=checkTime(s)
document.getElementById('txt').innerHTML=h+":"+m+":"+s
t=setTimeout('startTime()',500)}
function checkTime(i)
{if(i<10)
{i="0"+i}
return i}