diff --git a/js/batch.js b/js/batch.js
index b159df0..36b2eec 100644
--- a/js/batch.js
+++ b/js/batch.js
@@ -1,26 +1,30 @@
-jQuery(document).ready(function($) {
+jQuery( document ).ready( function($) {
   var batch_progress = function ( data ) {
     $( '.batch-progress-message' ).html( data['progress_message'] );
-    $( '.batch-percent' ).html( data['percent'] + "%" );
-    $( '.batch-progress > span' ).animate({ width: data['percent'] + "%" }, 500);
+    var percent = 0;
+    if ( 'undefined' != typeof data['percent'] ) {
+      percent = data['percent'];
+    }
+    $( '.batch-percent' ).html( percent + "%" );
+    $( '.batch-progress > span' ).animate({ width: percent + "%" }, 500);
   };
 
   function batch_process() {
     $.post(
-      ajaxurl+'?action=batch_operations&id='+batch_id,
-      function(data){
-        if (data['do']=='finish')
+      ajaxurl + '?action=batch_operations&id=' + batch_id,
+      function( data ) {
+        if ( 'finish' == data['do'] )
         {
           batch_progress( data );
-          $('.batch-message').html(data['message']).delay(1500).queue(function () {
-              $(location).attr('href',successful_page);
-              $(this).dequeue();
+          $( '.batch-message' ).html( data['message'] ).delay( 1500 ).queue( function () {
+              $( location ).attr( 'href', successful_page );
+              $( this ).dequeue();
             }
           );
         }
         else
         {
-          $('.batch-message').html(data['message']);
+          $( '.batch-message' ).html( data['message'] );
           batch_progress( data );
           batch_process()
         }
diff --git a/js/batch.min.js b/js/batch.min.js
index 5d64cea..9f06938 100644
--- a/js/batch.min.js
+++ b/js/batch.min.js
@@ -1 +1 @@
-jQuery(document).ready(function(a){function b(){a.post(ajaxurl+"?action=batch_operations&id="+batch_id,function(d){"finish"==d["do"]?(c(d),a(".batch-message").html(d.message).delay(1500).queue(function(){a(location).attr("href",successful_page),a(this).dequeue()})):(a(".batch-message").html(d.message),c(d),b())})}var c=function(b){a(".batch-progress-message").html(b.progress_message),a(".batch-percent").html(b.percent+"%"),a(".batch-progress > span").animate({width:b.percent+"%"},500)};b()});
\ No newline at end of file
+jQuery(document).ready(function(a){function b(){a.post(ajaxurl+"?action=batch_operations&id="+batch_id,function(d){"finish"==d["do"]?(c(d),a(".batch-message").html(d.message).delay(1500).queue(function(){a(location).attr("href",successful_page),a(this).dequeue()})):(a(".batch-message").html(d.message),c(d),b())})}var c=function(b){a(".batch-progress-message").html(b.progress_message);var c=0;"undefined"!=typeof b.percent&&(c=b.percent),a(".batch-percent").html(c+"%"),a(".batch-progress > span").animate({width:c+"%"},500)};b()});
\ No newline at end of file