Cross domain ajax call - IE9+, Chome, Firefox, etc

gistfile1.txt

/*********************************************************************************
  Cross domain ajax call
  
  
  IMPORTANT:
  ----------
  If the webservice you are calling uses http, then the page you are calling the 
  function below should be http
  
  If the webservice you are calling uses https, then the page you are calling the 
  function below should be https
  
  In other words: http->http and https->https
**********************************************************************************/

// How to use it
crossDomainAjax(url, function (data) {
  // Success code
});

function crossDomainAjax (url, successCallback) {
  // IE8 & 9 only Cross domain JSON GET request
  if ('XDomainRequest' in window && window.XDomainRequest !== null) {

      var xdr = new XDomainRequest(); // Use Microsoft XDR
      xdr.open('get', url);
      xdr.onload = function () {
          var dom  = new ActiveXObject('Microsoft.XMLDOM'),
              JSON = $.parseJSON(xdr.responseText);

          dom.async = false;

          if (JSON == null || typeof (JSON) == 'undefined') {
              JSON = $.parseJSON(data.firstChild.textContent);
          }

          successCallback(JSON); // internal function
      };

      xdr.onerror = function() {
          _result = false;  
      };

      xdr.send();
  } 

  // IE7 and lower can't do cross domain
  else if (navigator.userAgent.indexOf('MSIE') != -1 &&
           parseInt(navigator.userAgent.match(/MSIE ([\d.]+)/)[1], 10) < 8) {
     return false;
  }    

  // Do normal jQuery AJAX for everything else          
  else {
      $.ajax({
          url: url,
          cache: false,
          dataType: 'json',
          type: 'GET',
          async: false, // must be set to false
          success: function (data, success) {
              successCallback(data);
          }
      });
  }
}