function hodiny()
{
  dnes = new Date();

  with (dnes) 
  {
    hodin = getHours();
    minut = getMinutes();
    sekund = getSeconds();
  };

  cas = "   ";
  cas +=(hodin < 10  ? "0"  : "" ) + hodin;
  cas +=(minut < 10  ? ":0" : ":") + minut;
  cas +=(sekund < 10 ? ":0" : ":") + sekund;

  vypis("hodiny",cas);
  window.setTimeout("hodiny();",1000);
};

function vypis(kde,co)
{
        if(document.getElementById(kde))
        {
           document.getElementById(kde).innerHTML = co;
        };

        if(document.layers) if(document.layers[kde])
        {
           document.layers[kde].document.open();
           document.layers[kde].document.write(co);
           document.layers[kde].document.close();
        };
};