consume webservice using dojo
dojo.query("li").onclick(function(){
        var xhrArgs = {
                url: "http://192.168.1.65:9080/RAD8JAX-RSWeb/jaxrs/customers",

                handleAs: "json",
                headers: { "Content-Type": "application/json"},
                load: function(data) {
                alert("ok");
                    console.log(data);
                },
                error: function(error) {
                    console.log(error);
                }
            };
             dojo.xhrGet(xhrArgs);
 console.log("message sent ...");
});

// Create the store for later use
var store = new dojo.data.ItemFileReadStore({
  contentType: 'application/json'
  ,clearOnClose: true
  ,urlPreventCache: true
  ,url: "http://192.168.1.65:9080/RAD8JAX-RSWeb/jaxrs/customers"
});

store.fetch({
  onItem: function(item, request) {
    alert('I fire after each returned json item')
  }
  ,onComplete: function(items, findResult) {
    alert('I fire when the data has loaded completely.');
  }
  ,onError: function(error, request) {
    alert('I fire when an error occurs');
  }
});

store.close();