parsing - Chained State city dropdown list from JSON -

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i trying populate chained state city select dropdowns. using external json file so, consists of state , corresponding city name, id , pincode. can gimme idea on how achieve this. need populate city , pincode value based on state selection. in advance...

json

{ "alaska" : [             {"id": "1", "name": "adak", "pincode": "xxx1"},             {"id": "2", "name": "akhiok", "pincode": "xxx2" },             {"id": "3", "name": "akiak", "pincode": "xxx3" },                   ],  "arizona" : [             {"id": "4", "name": "apache junction", "pincode": "xxx4"},             {"id": "5", "name": "avondale", "pincode": "xxx5"},             {"id": "6", "name": "benson", "pincode": "xxx6"},         ],  "alabama" : [             {"id" : "5", "name": "abbeville", "pincode": "xxx7" },             {"id" : "7", "name": "adamsville", "pincode": "xxx8" },             {"id" : "8", "name": "akron", "pincode": "xxx9" },         ] }

final rendered html

<select id="state">       <option value="1">alaska</option>       <option value="2">arizona</option>       <option value="3">alabama</option>       </select>        <select id="city">       <option value="4">adak</option>       <option value="5">akhiok</option>       <option value="6">akiak</option>       </select>        <input id="pincode" type="text" />

i find question interesting , wrote corresponding solution can see live here.

here code:

jquery(document).ready(function () {     var mydata;     var oncitychange = function (e) {         var citydata = $("option:selected", e.target).data('pincode');         $("#pincode").val(citydata.pincode);     };     var onstatechange = function (e) {         var state = $("option:selected", e.target).text();         if (state && mydata) {             var statedata = mydata[state];             if (statedata && statedata.length > 0) {                 $("#city").empty();                 $("#city").unbind('change');                 (var = 0; < statedata.length; i++) {                     var citydata = statedata[i];                     var option = $('<option value="' + citydata.id + '">' + citydata.name + '</option>')                                     .data('pincode', citydata);                     $("#city").append(option);                 }                 $("#city").bind('change', oncitychange)                             .trigger('change');             }         }     };     $.ajax({         url: 'dependendselectsfromjson.json',         datatype: 'json',         success: function (data) {             var stateoptions = "", stateid = 1;             (var prop in data) {                 if (data.hasownproperty(prop)) {                     stateoptions += '<option value="' + stateid + '">' + prop + '</option>';                     stateid++;                 }             }             mydata = data;             $("#state").html(stateoptions)                 .bind('change', onstatechange)                 .trigger('change');         }     }); });

to access pincode of second (city) select box used jquery.data function find practical if 1 need associate additional information dom element. 1 save pincode value in way, used function save full information city.

updated: forgot mention json data posted has errors. should remove commas before ']'. problem cut&paste of data text of question.


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