function getDt(){  
dt=new Date();  
hrs=dt.getHours();  
min=dt.getMinutes();  
sec=dt.getSeconds();  
tm=" "+((hrs<10)?"0":"" ) +hrs+":";  
tm+=((min<10)?"0":"" )+min+":";  
tm+=((sec<10)?"0":"" )+sec+" ";  
document.getElementById('heure').innerHTML=tm;  
setTimeout("getDt()",1000);  
}