gistfile1.js

var countyOptionsTemplate = new EJS({text: "<option value=''></option><% for(var i=0; i<data.length; i++) { %><option value='<%= i %>'><%= data[i]['name'] %> County</option><% } %>"});
var locationData = new Object();

function GetScopedCounties(e) {
  var selectedState = $('#LocationState').val();
  if (!selectedState) {
    return;
  }
  countyOptionsTemplate.update('LocationCounty', locationData[selectedState].counties);
}

$(function() {
  $.get("/states.json", function(data) {
    for (var id in data)
      locationData[data[id].state.id] = data[id].state;
    GetScopedCounties();
    $('#LocationCounty').empty();
  });

  $('#LocationState').change(GetScopedCounties);

  GetScopedPDTypes();
  GetScopedPDs();

});