IE <= 8 doesn't support Date.now(). Fixes blueimp#1258.

Author: blueimp

js/jquery.fileupload.js

@@ -1,5 +1,5 @@
 /*
- * jQuery File Upload Plugin 5.11
+ * jQuery File Upload Plugin 5.11.1
  * https://github.com/blueimp/jQuery-File-Upload
  *
  * Copyright 2010, Sebastian Tschan
@@ -185,7 +185,7 @@
         ],
 
         _BitrateTimer: function () {
-            this.timestamp = Date.now();
+            this.timestamp = +(new Date());
             this.loaded = 0;
             this.bitrate = 0;
             this.getBitrate = function (now, loaded, interval) {
@@ -231,7 +231,7 @@
 
         _onProgress: function (e, data) {
             if (e.lengthComputable) {
-                var now = Date.now(),
+                var now = +(new Date()),
                     total,
                     loaded;
                 if (data._time && data.progressInterval &&