function increment(id_chps,mini,incr)
{
	var champs = document.getElementById(id_chps);
	if (champs.value == "" || champs.value == "0" || isNaN(champs.value))
	{
		champs.value = mini;
	}
	else
	{
		champs.value = Number(champs.value) + incr;
	}
}

function decrement(id_chps,mini,incr)
{
	var champs = document.getElementById(id_chps);
	if (champs.value == "" || champs.value == "0" || champs.value == mini || isNaN(champs.value)) 
	{
		champs.value = 0;
	}
	else
	{
		champs.value = champs.value - incr;
	}
}

function maj_pan(id,qt,decr)
{
		if (decr == 1)
		{
			parent.panier.location.href = "liste_panier.asp?aff=plat&ajout=1&id=" + id + "&qt=" + qt;
		}
		else
		{
			if (verif_multiple() == true)
			{
				parent.panier.location.href = "liste_panier.asp?aff=plat&ajout=1&id=" + id + "&qt=" + qt;
			}
			else
			{
				document.getElementById("qt_"+id).value = qt - 1;
			}
		}
}

function testvide(chps)
{
	if(document.getElementById(chps).value == "" )
	{
		document.getElementById(chps).value = 0;
	}
}

//-->