function decompte(date)
{
	//calcul de la nouvelle date
	date[4]=date[4]-1;
	if(date[4]<0)
	{
		date[4]=59
		date[3]=date[3]-1;
		if(date[3]<0)
		{
			date[3]=59
			date[2]=date[2]-1;
			if(date[2]<0)
			{
				date[2]=24
				date[1]=date[1]-1;
				if(date[1]<0)
				{
					date[1]=31
					date[0]=date[0]-1;
					if(date[0]<0)
					{
						date[0]=12
					}
				}
			}
		}
	}
	//affichage de la date
	var txt="";
	for(i=0; i<date.length; i++)
	{
		if(date[i]<=9)
		{txt+="0"+date[i];}
		else
		{txt+=date[i];}
		if(i!=date.length-1)
		{
		txt+=" : ";
		}
	}
	document.getElementById('decompte').innerHTML=txt;
	setTimeout('decompte(date)', 1000);
}