function aggiornaOrologio()
{
    var currentTime = new Date ();

    var currentHours = currentTime.getHours ( );
    var currentMinutes = currentTime.getMinutes ( );
    var currentSeconds = currentTime.getSeconds ( );

    currentMinutes = ( currentMinutes < 10 ? "0" : "" ) + currentMinutes;
    currentSeconds = ( currentSeconds < 10 ? "0" : "" ) + currentSeconds;

    var currentTimeString = currentHours + ":" + currentMinutes + ":" + currentSeconds;

    document.getElementById("clock").innerHTML = currentTimeString;
}