Javascript and JSON

We have an json graph such as : { "id": "57", "coats": { "81": [ { "priceBand": "A", "description": "very nice etc etc." } ], "82": [ { "priceBand": "B", "description": "very nice" }, { "priceBand": "C", "description": "very nice etc" } ], "86": [ { "priceBand": "A", "description": "etc." } ] }, "shirts": { "63": [ { "priceBand": "D", "description": "etc. etc." }, { "priceBand": "A", "description": "etc etc" }, { "priceBand": "C", "description": "etc. etc." } ] }, "jeans": { "57": [ { "priceBand": "B", "description": "etc. etc." }, { "priceBand": "A", "description": "etc. etc." }, { "priceBand": "C", "description": "etc etc" } ] }, "jumpers": { "57": [ { "priceBand": "E", "description": "etc. etc." } ] } } we would like to pass in an argument for price band such as "A" and get the function to return an object that returns an object such as the following based on: A check is made per section i.e. Coats, Jeans etc. If it has a priceBand that matches the passed in price Band, then select that item. Otherwise, if it matches price Band "A", then select that item Otherwise do not return anything for that section { "coats": { "81": { "priceBand": "A", "description": "very nice etc" } } "shirts": { "63": { "priceBand": "C", "description": "etc. etc." } } "jeans": { "57": { "priceBand": "E", "description": "etc. etc." } } }