jIO ajax beforeSend moved just before xhr.send()

src/jio/core/util.js

@@ -332,9 +332,6 @@ function ajax(param) {
     });
     xhr.addEventListener("error", reject);
     xhr.addEventListener("progress", notify);
-    if (typeof param.beforeSend === 'function') {
-      param.beforeSend(xhr);
-    }
     if (typeof param.xhrFields === 'object' && param.xhrFields !== null) {
       for (k in param.xhrFields) {
         if (param.xhrFields.hasOwnProperty(k)) {
@@ -342,6 +339,9 @@ function ajax(param) {
         }
       }
     }
+    if (typeof param.beforeSend === 'function') {
+      param.beforeSend(xhr);
+    }
     xhr.send(param.data);
   }, function () {
     xhr.abort();