function returnEltById(id) { 
  if (document.getElementById) 
  { 
    return document.getElementById(id); 
  } 
  else if (document.all) 
  { 
    return document.all[id]; 
  } 
  else if (document.layers) 
  { 
    return document.layers[id]; 
  } 
  else 
  { 
    return false; 
  } 
} 

var fxHeure = function (){
            today = new Date();
            
            heures = today.getHours();
            if (heures < 10)
            {
              heures = "0" + heures;
            }
            else
            {
              heures = heures;
            }
            minutes = today.getMinutes();
            if (minutes < 10)
            {
              minutes = "0"+minutes;
            }
            else
            {
              minutes = minutes;
            }
            secondes = today.getSeconds();
            if (secondes < 10)
            {
              secondes = "0"+secondes;
            }
            else
            {
              secondes = secondes;
            }
            returnEltById("heure").innerHTML = '<p class="heure">'+heures+'h'+minutes+'min'+secondes+'</p>';
}

var periodical;

fxHeure();

periodical = fxHeure.periodical(1000);