if ($.browser.msie && window.XDomainRequest) {
            // Use Microsoft XDR
            var xdr = new XDomainRequest();
            xdr.open("get", url);
            xdr.onload = function() {
                // XDomainRequest doesn't provide responseXml, so if you need it:
                var dom = new ActiveXObject("Microsoft.XMLDOM");
                dom.async = false;
                dom.loadXML(xdr.responseText);
            };
            xdr.send();
        } else {
            $.ajax({...});
        }