function checkOrder() {
	var e = null;

	e = document.getElementById("quantity");
	var quantity = e.value;
	if(quantity == "" || quantity == "0") { alert("Zadejte objednávané množství."); focusError(e, "red"); return false; }

	e = document.getElementById("order_name");
	var name = e.value;
	if(name == "") { alert("Zadejte jméno."); focusError(e, "red"); return false; }

	e = document.getElementById("order_email");
	var email = e.value;
	if(email == "") { alert("Zadejte email."); focusError(e, "red"); return false; }
	if(!checkEmail(email)) { alert("Neplatný formát emailové adresy."); focusError(e, "blue"); return false; }

	e = document.getElementById("order_street");
	var street = e.value;
	if(street == "") { alert("Zadejte ulici."); focusError(e, "red"); return false; }

	e = document.getElementById("order_town");
	var town = e.value;
	if(town == "") { alert("Zadejte obec."); focusError(e, "red"); return false; }

	return true;
}