function div_cent(t)
{
	var tt, l;
	
	if( t == 0 )
	{
		tt = '';
	}
	else
	{
		tt = t.toString();
		l = tt.length;
		if( l < 3 )
		{
			tt = '000'.concat(tt).substring(3-l, 3);
			l = 3;
		}
		
		tt = tt.substring(0, l-2).concat(',').concat(tt.substring(l-2,l));
	}
	
	return tt;
}

function total(n)
{
	var i, t, tt, tot, l;
	var r = re = /[^0-9]/g;

	tot = 0;
	
	for(i = 1; i <= n; i++)
	{
		t = document.forms['commande']['qte' + i].value;
		// que des nombres entiers
		tt = t.replace(r, '');
		if( tt != t )
		{
			t = tt;
			document.forms['commande']['qte' + i].value = t;
		}
		t = t * document.forms['commande']['prix' + i].value;
		tot = tot + t;

		document.forms['commande']['total' + i].value = div_cent(t);
	}
	
	document.commande.somme.value = div_cent(tot);
}