Convert JavaScript object to x-www-form-urlencoded format

JSON_to_URLEncoded.js

if (!window['hdden_JSON_to_URLEncoded']) {
  window['hdden_JSON_to_URLEncoded'] = hdden_JSON_to_URLEncoded;
}
function hdden_JSON_to_URLEncoded(element, key, list) {
  var list = list || [];
  if (typeof (element) == 'object') {
    for (var idx in element)
      hdden_JSON_to_URLEncoded(element[idx], key ? key + '[' + idx + ']' : idx, list);
  } else {
    list.push(key + '=' + encodeURIComponent(element));
  }
  return list.join('&');
}

JSON_to_URLEncoded_TEST.js

var data = {
  'users' : [
    {
      "id": 100,
      "name": "Stefano"
    },
    {
      "id": 200,
      "name": "Lucia"
    },
    {
      "id": 300,
      "name": "Franco"
    },
  ],  
  'time' : +new Date
};

console.log(
  JSON_to_URLEncoded(data)
);

/*
Output:

users[0][id]=100&users[0][name]=Stefano&users[1][id]=200&users[1][name]=Lucia&users[2][id]=300&users[2][name]=Franco&time=1405014230183

*/