jquery - CORS with JSON Fallback for IE -

i have following code works on browsers except ie: access denied. please help!!! have looked @ tons of examples , still cannot resolve this. keep simple doing returning text url.

<script type="text/javascript">     // insure document loaded...     $(document).ready(function() {          // set url pos api...         var posapiurl = 'https://test.safety.com/posapi/getposmessage?app=rmis';           // load pos api message...         function loadposmessage(edurl) {              if (window.xmlhttprequest) {                 xmlhttp = new xmlhttprequest();             } else if (window.xdomainrequest) {                 xmlhttp = new xdomainrequest();             } else {                 xmlhttp = new activexobject("microsoft.xmlhttp");             }             xmlhttp.onreadystatechange = function() {                 if (xmlhttp.readystate == 4 && xmlhttp.status == 200) {                     var jsonedition = xmlhttp.responsetext;                     var objedition = json.parse(jsonedition);                     $.each(objedition, function(key, val) {                         if (val.length === 0) {                             $('.posmsgcontainer').hide();                         } else {                             $('.posmsgcontainer').html(val);                         }                       });                 }             };             xmlhttp.open("get", edurl, true);             xmlhttp.send();         }          // make call load pos message...         loadposmessage(posapiurl);       });   </script> 

the code above won't work because api ie's xdomainrequest different of xmlhttprequest. example, instead of onreadystatechange() uses onload().

i've found simplest way support cors on ie 8/9 include xhr-xdr-adapter.js file here: https://github.com/intuit/xhr-xdr-adapter/blob/master/src/xhr-xdr-adapter.js

you can include needed follows:

<!--[if lt ie 10]> <script src="xhr-xdr-adapter.js" type="text/javascript"></script> <![endif]--> 

once include xhr-xdr-adapter, can use standard xmlhttprequest api, , not worry whether you're running on ie 8/9 or not (as long don't need fancy send custom headers, or use method other or post.)