You can use jQuery each function as it is explained below:
Define your data:
var jsonStr = '[{"name":"Lenovo Thinkpad 41A4298,"website":"google"},{"name":"Lenovo Thinkpad 41A2222,"website":"google"},{"name":"Lenovo Thinkpad 41Awww33,"website":"yahoo"},{"name":"Lenovo Thinkpad 41A424448,"website":"google"},{"name":"Lenovo Thinkpad 41A429rr8,"website":"ebay"},{"name":"Lenovo Thinkpad 41A429ff8,"website":"ebay"},{"name":"Lenovo Thinkpad 41A429ss8,"website":"rediff"},{"name":"Lenovo Thinkpad 41A429sg8,"website":"yahoo"}]';
Parse JSON string to JSON object:
var json = JSON.parse(jsonStr);
Iterate and filter:
$.each(JSON.parse(json), function (idx, obj) {
if (obj.website == 'yahoo') {
// do whatever you want
}
});