maybe?

www/js/autodoc.js

       xhr: function()
       {
         var xhr = $.ajaxSettings.xhr();
-        xhr.upload.addEventListener("progress", (function(evt){
+        xhr.upload.addEventListener("progress", (function(){
           var id = e.data;
-          return function() {
+          return function(evt) {
             if (evt.lengthComputable) {  
               var progress = Math.floor(evt.loaded / evt.total * 50);
               if ( progress < 1 ) { progress = 1; }