Zdrojový kód:

<script language="JavaScript" type="text/javascript">
//NASTAVENIA
var sek = 1; //SEKUNDY: 0=vypnute, 1=zapnute
var datum = 1; //DATUM: 0=vypnute, 1=zapnute
var dni = 1; //NAZOV DNA: 0=vypnute, 1=zapnute

_den = new Array("Nedeľa","Pondelok","Utorok","Streda","Štvrtok","Piatok","Sobota");
function hod()
{
	_cas = new Date();
	hodiny = _cas.getHours();
	minuty = _cas.getMinutes();
	sekundy = _cas.getSeconds();
	den_t = _cas.getDay();
	den = _cas.getDate();
	mesiac = _cas.getMonth();
	rok = _cas.getFullYear();
	mesiac++;
	if (hodiny < 10) hodiny = "0" + hodiny;
	if (minuty < 10) minuty = "0" + minuty;
	if (sekundy < 10) sekundy = "0" + sekundy;

	if (sek == 1) {
		full_time = hodiny + ":" + minuty + ":" + sekundy;
	} else {
		full_time = hodiny + ":" + minuty;
	}

	if (datum == 1) {
		full_time = full_time + "<br>" + den + "." + mesiac + ". " + rok;
	} else {
		full_time = full_time;
	}

	if (dni == 1) {
		full_time = full_time + "<br>" + _den[den_t];
	} else {
		full_time = full_time;
	}

	cas.innerHTML = full_time;
	window.setTimeout("hod()",500);
}
</script>
</head>
<body onLoad="hod();">

Nastaveniami v úvode skriptu môžeme dosiahnúť napr aj toto:
var sek = 0;
var datum = 0;
var dni = 0;

var sek = 1;
var datum = 0;
var dni = 0;

var sek = 1;
var datum = 0;
var dni = 1;

var sek = 1;
var datum = 1;
var dni = 0;