function Hodiny(s) 
{ 
    var runTime = new Date(); 
    var hours = runTime.getHours(); 
    var minutes = runTime.getMinutes(); 
    var seconds = runTime.getSeconds(); 
    var mz = ""; 
    if (hours > 12) { 
      mz = ""; 
    } 
    if (hours == 0) { 
      hours = 0; 
    } 
    if (hours <= 9) { 
      hours = "0" + hours; 
    } 
    if (minutes <= 9) { 
      minutes = "0" + minutes; 
    } 
    if (seconds <= 9) { 
      seconds = "0" + seconds; 
    } 
    if (s) seconds = ":" + seconds; 
    else seconds = seconds; 
            
     dat = new Date(); 
     with(dat){ 
     den = getDay(); 
     d = getDate(); 
     m = getMonth(); 
      
     if (document.all) r = getYear() 
     else r = getYear() + 1900 
     } 
 
    document.getElementById("datum").innerHTML = d + ". " + (m+1) + ". "+ r + " " + hours + ":" + minutes + ":" + seconds; 
 
if (s) window.setTimeout("Hodiny(1)", 1000); 
    else window.setTimeout("Hodiny(0)", 1000); 
}