jQuery 1.3 : Working with numeric form data (part 9) - The finished code

$(document).ready(function() {
var stripe = function() {
$('#cart tbody tr').removeClass('alt')
.filter(':visible:odd').addClass('alt');
};
stripe();
$('#recalculate').hide();
$('.quantity input').keypress(function(event) {
if (event.which && (event.which < 48 ||
event.which > 57)) {
event.preventDefault();
}
}).change(function() {
var totalQuantity = 0;
var totalCost = 0;
$('#cart tbody tr').each(function() {
var price = parseFloat($('.price', this)
.text().replace(/^[^\d.]*/, ''));
price = isNaN(price) ? 0 : price;
var quantity =
parseInt($('.quantity input', this).val(), 10);
var cost = quantity * price;
$('.cost', this).text('$' + cost.toFixed(2));
totalQuantity += quantity;
totalCost += cost;
});
$('.subtotal .cost').text('$' + totalCost.toFixed(2));
var taxRate = parseFloat($('.tax .price').text()) / 100;
var tax = Math.ceil(totalCost * taxRate * 100) / 100;
$('.tax .cost').text('$' + tax.toFixed(2));
totalCost += tax;
$('.shipping .quantity').text(String(totalQuantity));
var shippingRate = parseFloat($('.shipping .price')
.text().replace(/^[^\d.]*/, ''));
var shipping = totalQuantity * shippingRate;
$('.shipping .cost').text('$' + shipping.toFixed(2));
totalCost += shipping;
$('.total .cost').text('$' + totalCost.toFixed(2));
});
$('<th>&nbsp;</th>')
.insertAfter('#cart thead th:nth-child(2)');
$('#cart tbody tr').each(function() {
$deleteButton = $('<img />').attr({
'width': '16',
'height': '16',
numeric form data, working withshopping cart page code'src': '../images/cross.png',
'alt': 'remove from cart',
'title': 'remove from cart',
'class': 'clickable'
}).click(function() {
$(this).parents('tr').find('td.quantity input')
.val(0).trigger('change')
.end().hide();
stripe();
});
$('<td></td>')
.insertAfter($('td:nth-child(2)', this))
.append($deleteButton);
});
$('<td>&nbsp;</td>')
.insertAfter('#cart tfoot td:nth-child(2)');
});
$(document).ready(function() {
var editShipping = function() {
$.get('shipping.php', function(data) {
$('#shipping-name').remove();
$(data).hide().appendTo('#shipping').slideDown();
$('#shipping form').submit(saveShipping);
});
return false;
};
var saveShipping = function() {
var postData = $(this).serialize();
$.post('shipping.php', postData, function(data) {
$('#shipping form').remove();
$(data).appendTo('#shipping');
$('#shipping-name').click(editShipping);
});
return false;
};
$('#shipping-name').click(editShipping);
});