javascript - How to iterate through a json object?

I want to iterate through a json object which is two dimensional ...
for a one dimensional json object I do this

for (key in data) {

alert(data[key]);
}

what do i do about a two dimensional one??

Answer

There is no two dimensional data in Javascript, so what you have is nested objects, or a jagged array (array of arrays), or a combination (object with array properties, or array of objects). Just loop through the sub-items:

for (var key in data) {
  var item = data[key];

  for (var key2 in item) {
    alert(item[key2]);
  }
}