Object fields sequence

Question

I have a JavaScript object written in javascript code as below:

var rtnStr = {\"000\":\"area000\",\"020\":\"area020\",\"030\":\"area030\",
              \"040\":         


        

Answer 1

 var rtnStr = {"000":"area000","020":"area020","030":"area030",
              "040":"area040","047":"area047","049":"area049",
              "050":"area050","060":"area060","070":"area070",
              "100":"area100", "900":"area900"};

  array_ = [];

  for (var key in rtnStr) {
    array_.push(key)
  }

  array_.sort();


  for (var key in array_) {
    document.write('rtnStr[' + key + ']= ' + rtnStr[key] + '
');
  }