function casadatum() {
cas = new Date();
hod = cas.getHours();
mnt = cas.getMinutes();
sek = cas.getSeconds();
dvt = cas.getDay();
den = cas.getDate();
mes = cas.getMonth();
rok = cas.getFullYear();
mnt=kontrola(mnt);
sek=kontrola(sek);
switch (dvt){
case 0: dvt = "Nedeľa";
	break;
case 1: dvt = "Pondelok";
	break;
case 2: dvt = "Utorok";
	break;
case 3: dvt = "Streda";
	break;
case 4: dvt = "Štvrtok";
	break;
case 5: dvt = "Piatok";
	break;
case 6: dvt = "Sobota";
	break;};
mes = 1+mes;
document.getElementById('hodiny').innerHTML=hod+":"+mnt+":"+sek+"<br>"+dvt+",&nbsp;"+den+"."+mes+"."+rok;
tc=setTimeout('casadatum()',1000);
}

function kontrola(i) {
if (i<10) 
  {i="0" + i};
  return i;
}

casadatum();