Properly handle error responses

cms/templates/import.html

@@ -77,15 +77,10 @@ $('#fileupload').fileupload({
                 e.preventDefault();
                 submitBtn.hide();
                 data.submit().complete(function(result, textStatus, xhr) {
-                    if (result.status != 200 && result.status != 302) {
-                        alert('${_("Your import has failed.")}\n\n' + JSON.parse(result.responseText)["ErrMsg"]);
+                    if (xhr.status != 200) {
+                        alert('${_("Your import has failed.")}\n\n' + result["ErrMsg"]);
                         submitBtn.show();
                         bar.hide();
-                    } else {
-                        if (result.responseText["ImportStatus"] == 1) {
-                            bar.hide();
-                            statusBlock.show();
-                        }
                     } 
                 });
             });