uc_nostock

No Stock is designed to prevent clients from checking out SKU's that are out of stock. It does this as follows:

1. Disables the 'Add to Cart' button.
2. Displays model stock on add-to-cart forms.
3. Disables the 'Buy it now' button.
4. Notifies the user when they add an SKU to the cart.
5. Sets a form error on the cart view, checkout, and checkout review forms.
6. Prevents an order from being submitted.

This behaviour is enabled by default when the module is installed. Fine-grained per-sku toggling is provided via
the product stock edit page. To work, stock tracking AND no stock behaviour must be enabled.

If you have uc_attribute module enabled, No Stock integrates with the uc_skua (SKU Ajax Adjustment) module to
update the following form elements when the client changes the SKU via the UI:
1. Stock quantity.
2. Add-to-cart button.
3. Quantity field.

Form error and other messages are themeable, and therefore can be overriden/customized in your template.php theme file.