This add-on allows you to show the live stock levels from ActiveStock on your product pages. You can also use it to replace the Add to Cart button with an Out of Stock message when your stock levels get to zero.
You can see it in action at the ActiveStock test site here: http://activestock.mumstuff.co.uk/index.html
Please look through the helpfile (which you can download here) for full details of how it works and how to set it up. (If you are running Windows Vista, please check the advice on this blog post.)
The digital download zip file contains:
1) A perl script that reads the data from the ActiveStock stock file on your website
2) The javascript file that you include in your product layouts in Actinic and
3) Full instructions (the help file mentioned above)