title: populating combobox in dijit using json file retrived using dojo.xhrGet
body: <p>i am working on dojo and i am a beginer. well, i want to create a Create a dojo ItemFileReadStore using the data retrived from a json file using ajax (dojo.xhrGet) , which can be used to populate the combo box. i tried working on it , but no success ! can anyone please guide me through how i can call the json file and then use the data to populate the combobox !</p>
  
  <pre><code>var _getPlacetypes = function(){
          dojo.xhrGet({
              url: "place_types.json",
              handleAs: "json",
              timeout: 5000,
              load: function(response, args) {
                  console.log(response);
  
              },
              error: function(error_msg,details) {
                  PropertyMap.handleError(error_msg, details);
              }
          });
      }
  
      var myStore = new dojo.data.ItemFileReadStore({
          jsId:data,
          url: "place_types.json",
          });
  </code></pre>
  
  <p>i am using something like this ! is it the right way ?</p>
  
  <p>thanks </p>
  
  <p>regards !</p>