Unique filter by attributes option values to help store customers with searching or filtering products.
Filter can be used for any Oscommerce based stores (MS *, CREloaded, OscMax, WAI etc).

Store visitors can choose any option value in the dropdown. After this only "depended" values at other dropdowns will be able for select. Visitor select other value in the dropdown and rest dropdown show only depended option values for first and second selects. So after every select values at notselected dropdowns will be reduced and products at product listing will be reduced too. Any set of selected option values has at list one product at search result.

100% of the search results with products.

Demo of Ajax Dropdown Products Filter by Attributes Options Values on Oscommerce MS 2.2 store is here.