Accept header not working

Accept header not working

I have to call for an web service which requires a Accept header and then it returns a json result. I test the service with "Postman" and got the response succesfully.but its not working when trying to do programatically

  2.  $(document).ready(function () {

  4.             var xhr = new XMLHttpRequest();
  5.             $.ajax({
  6.                 url: 'http://102.22.169.113:9763/services/charaka_DataService/select_all_configs_operation?config_key=MAX',
  7.                 type: 'GET',
  8.                 dataType: 'json',
  9.                 accept: {
  10.                     json: 'application/json/salaya'
  11.                 },
  12.                 cache: false,
  13.                 success: function (data) {
  14.                     alert(data);
  15.                 },
  16.                 error: function (xhr, errorType, exception) {
  17.                     alert('request failed :' + exception);
  18.                 }
  19.             });
  20.         });