gistfile1.js

var obj = {
        "car": [
            {"@id": 10, "@color": "silver", "name": "Volvo"},
            {"@id": 11, "@color": "red",    "name": "Saab"},
            {"@id": 12, "@color": "red",    "name": "Peugeot"},
            {"@id": 13, "@color": "yellow", "name": "Porsche"}
        ],
        "bike": [
            {"@id": 20, "@color": "black", "name": "Cannondale"},
            {"@id": 21, "@color": "red",   "name": "Shimano"}
        ]
    },
    search = JSON.search(obj, '//car[@color="yellow"]/name');

console.log( search );
// ["Porsche"]

var reds = JSON.search(obj, '//*[@color="red"]');

for (var i=0; i<reds.length; i++) {
    console.log( reds[i].name );
}
// Saab
// Peugeot
// Shimano