Faceted Checkbox Ajax Search Filter

We have a form where product details are uploaded. There are mulitple categories and each category has few sub category options. We need search with ajax as follows 1. Initial keyword search to reach search page. The search comes from product title and description. 2. On left panel there will be categories mentioned and under each category will be subcategory names with radio buttons/ checkboxes so that one option out of differnt can be selected. On clicking on any checkbox on the left , the search results will be filtered and updated through ajax . Also further searches from the searchbox will come through ajax.