function getDt(){
  dt=new Date();
  hrs=dt.getHours();
  min=dt.getMinutes();
  sec=dt.getSeconds();
  tm=""+((hrs<10)?"0":"") +hrs+":";
  tm+=((min<10)?"0":"")+min+":";
  tm+=((sec<10)?"0":"")+sec+" ";
  document.relogio.display.value=tm;
  setTimeout("getDt()",1000);
}