diff --git a/boards/static/js/thread_update.js b/boards/static/js/thread_update.js
--- a/boards/static/js/thread_update.js
+++ b/boards/static/js/thread_update.js
@@ -217,9 +217,34 @@ function resetForm(form) {
     form.find('input:text, input:password, input:file, select, textarea').val('');
     form.find('input:radio, input:checkbox')
              .removeAttr('checked').removeAttr('selected');
-    $('#file_wrap').find('#file-thumb').remove();
+    $('.file_wrap').find('.file-thumb').remove();
 }
 
+/**
+ * When the form is posted, this method will be run as a callback
+ */
+function updateOnPost(response, statusText, xhr, form) {
+    var json = $.parseJSON(response);
+    var status = json.status;
+
+    form.children('.form-errors').remove();
+
+    if (status === 'ok') {
+        resetForm(form);
+        updateThread();
+    } else {
+        var errors = json.errors;
+        for (var i = 0; i < errors.length; i++) {
+            var fieldErrors = errors[i];
+
+            var error = fieldErrors.errors;
+
+            var errorList = $('<div class="form-errors">' + error
+                    + '<div>');
+            errorList.appendTo(form);
+        }
+    }
+}
 
 $(document).ready(function(){
     initAutoupdate();
@@ -228,33 +253,13 @@ function resetForm(form) {
     var threadId = $('div.thread').children('.post').first().attr('id');;
 
     var form = $('#form');
+
     var options = {
         success: updateOnPost,
-        url: '/api/add_post/' + threadId + '/',
+        url: '/api/add_post/' + threadId + '/'
     };
 
     form.ajaxForm(options);
 
-    function updateOnPost(response, statusText, xhr, $form) {
-         var json = $.parseJSON(response);
-         var status = json.status;
-
-         form.children('.form-errors').remove();
-
-         if (status === 'ok') {
-             resetForm(form);
-             updateThread();
-         } else {
-             var errors = json.errors;
-             for (var i = 0; i < errors.length; i++) {
-                 var fieldErrors = errors[i];
-
-                 var error = fieldErrors.errors;
-
-                 var errorList = $('<div class="form-errors">' + error
-                     + '<div>');
-                 errorList.appendTo(form);
-             }
-         }
-     }
+    resetForm(form);
 });