function time() {
var now= new Date();
var ngay= now.getDate();
if(ngay<10)
  ngay="0" + ngay;
var thang=now.getMonth()+1;
if(thang<10)
   thang="0" + thang;
var nam=now.getFullYear();
var thu=now.getDay();
var m;
switch(thu)
{
 case 0: m="Sun";
      break;
   case 1: m="Mon";
      break;
   case 2: m="Tue";
      break;
   case 3: m="Wed";
      break;
   case 4: m="Thu";
      break;
   case 5: m="Fri";
      break;
   case 6: m="Sat"; 
      break;
   }
var hour= now.getHours();
var min= now.getMinutes();
var sec= now.getSeconds();
if (min<10) {
min = "0" + min;
}
if (sec<10) {
sec = "0"+sec;
}
var time= m+", "+ngay+"/"+thang+"/"+nam+", "+hour+":"+min+":"+sec;

document.getElementById('pendule').innerHTML=time;
t=setTimeout('time()',500);

}