function check_qty(max_qty) {
		if (document.add2cartform.qty.value > max_qty) {
		alert('You may not order more than ' + max_qty + ' pieces.');
		return false;
		} 
		if (document.add2cartform.qty.value <= 0) {
		alert('You can not specify 0 or negative pieces for the quantity.');
		document.add2cartform.qty.value = 1;
		return false;
		}
		return true;
	}