function chkfrmprod(objform) {
	var checkbox_choices = 0;
	if (objform.qty.value == 0 || objform.qty.value == '') {
		objform.qty.focus();
		alert('Please enter a quantity.')
		return false;		
	}
	return true;
}

function checkCartAdd(objForm) {
	if(!isNonnegativeInteger(objForm.qty.value))
	{
		alert("Please enter a valid number for this value, or 0 to remove.");
		objForm.qty.value = "";
		objForm.qty.focus();
		return false
	}
	return true;
}