// JavaScript Document
function updatePrice() {
	var quantity = document.form_panier.quantity.value;
	if(isNum(quantity) && quantity > 0) {
		var total = quantity * 3.99;
		total = total.toFixed(2);
		total = total.toString();
		var temp = new Array();
		temp = total.split('.');
		document.form_panier.total.value = temp[0] + ',' + temp[1] + '$';
	}else{
		alert('Veuillez entrer un nombre entre 1 et 99.\nPlease enter a number between 1 and 99.');
		document.form_panier.quantity.value = 1;
	}	
}

var numb = '0123456789';
var lwr = 'abcdefghijklmnopqrstuvwxyz';
var upr = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';

function isValid(parm,val) {
	if (parm == "") return true;
	for (i=0; i<parm.length; i++) {
		if (val.indexOf(parm.charAt(i),0) == -1) return false;
	}
	return true;
}

function isNum(parm) {return isValid(parm,numb);}