Firefox aborting some ajax request -

i using firefox 20.0.1 version.

firefox shows status aborted request. if refresh again not show aborted status.

my code:

for (index in personscorecollection.collection) {     // scores(2nd, 3rd, 4th , 5th scores)     $.when(         variableset(collectionobject, index),         endorsementrankforeachperson(index),         usabilityscore(index),         userconnection(index),         usersearch(index)     ).done(); } 

inside function calling ajax request.

my ajax request code

var xdr;     if (window.xdomainrequest) // check whether browser supports xdr.     {         xdr = new xdomainrequest(); // create new xdr object.         if (xdr) {             xdr.open("post", urlsearch);             xdr.timeout = 3000;//set timeout time  3 second.             xdr.onload = function () {                 try{                     //success method                 }                 catch (err) {                     //error method                 }             };             xdr.onprogress = function () { };             xdr.onerror = function () {                    //error method             };             xdr.ontimeout = function () {                    //error method             };             xdr.send();         }     }     else {         $.ajax({             url: urlsearch,             type: 'post',             datatype: 'json',             timeout: 3000,             success: function (data) {                    //success method             },             error: function () {                    //error method             }         });     } 

my problem ajax request aborted in firefox (but works fine in other browsers). if refresh again showing result.

please me solve issue.

thanks in advance.