[рони]

DarkPhoenix,

function copy(obj) {
  var copyObj = Array.isArray(obj) ? [] : {};
  for (var key in obj) {
    if (obj.hasOwnProperty(key)) {
      if ("object"===typeof obj[key] && obj[key] !== null)
      copyObj[key] = copy(obj[key]);
      else
      copyObj[key] = obj[key];
    }
  }
 return copyObj;
}