ajaxtransport.js

function fixJQueryAjaxTransport(jQuery) {

    if ( window.XDomainRequest ) {

        jQuery.ajaxTransport(function( s ) {
            if ( s.crossDomain && s.async ) {
                if ( s.timeout ) {
                    s.xdrTimeout = s.timeout;
                    delete s.timeout;
                }
                var xdr;
                return {
                    send: function( _, complete ) {
                        function callback( status, statusText, responses, responseHeaders ) {
                            xdr.onload = xdr.onerror = xdr.ontimeout = jQuery.noop;
                            xdr = undefined;
                            complete( status, statusText, responses, responseHeaders );
                        }
                        xdr = new XDomainRequest();
                        xdr.onload = function() {
                            callback( 200, "OK", { text: xdr.responseText }, "Content-Type: " + xdr.contentType );
                        };
                        xdr.onerror = function() {
                            callback( 404, "Not Found" );
                        };
                        xdr.onprogress = jQuery.noop;
                        xdr.ontimeout = function() {
                            callback( 0, "timeout" );
                        };
                        xdr.timeout = s.xdrTimeout || Number.MAX_VALUE;
                        xdr.open( s.type, s.url );
                        xdr.send( ( s.hasContent && s.data ) || null );
                    },
                    abort: function() {
                        if ( xdr ) {
                            xdr.onerror = jQuery.noop;
                            xdr.abort();
                        }
                    }
                };
            }
        });
    }

}