How to read json data of zoho-creator via url ?

How to read json data of zoho-creator via url ?

I have url of zoho creator from there i can get json data.
here is this url "  https://creator.zoho.com/api/json/yugapp-feedback/view/Guest_Book_View/apikey="

This script i am using for read json data
  1. $(document).ready(function() {
  2.  $.ajax({
  3.         url: 'https://creator.zoho.com/api/json/yugapp-feedback/view/Guest_Book_View/apikey=',
  4.         type: 'GET',
  5.         dataType: 'json',
  6.         contentType: 'application/json; charset=utf-8',
  7.         success: function (data) {
  8.         $.each(data, function (i, item) {
  9.                 $("#results").append(item.Comments);
  10.                 alert("#results");
  11.             });
  12.         }
  13.     });
  14. });
I am not getting data at all when i load this script.

Could any one please explain me how should i get data from that URL .

Thanks in advance