Hi stylemangi,
You're right in that WP will strip any code from a post that could be potentially harmful to the system (i.e. Javascript/PHP). This is done regardless of whether it's just a post entry or a page.
[sidenote]Linda, the WP pages - though they look similar to static HTML pages - are actually created on the fly like the post entries. The main difference is that a page will not be included in the chronological listing of the entries or in the feed.[/sidenote]
There is a plugin I know of that allows you to add blocks of code to blog entries and may be able to work for javascript, but I'm curious to know how this javascript will display. The javascript is just a single item javascript, or will it be displaying multiple products, or is it configurable somehow?
The reason I bring it up is because the last thing you would want is the entire inventory of products in a single WordPress entry. It defeats the purpose and doesn't take full advantage of WordPress' natural "seo-ness".
In any event, Wayne outlines a way to
add Javascript using his AdSense Deluxe plugin (which can be used for
far more than AdSense).
Hope that helps out and good luck!
~ Teli