Remove remotipart (not working with ie9) the upload is working except that the pop-up does not disappear in ie

Gemfile

@@ -26,7 +26,7 @@ gem 'mysql2'
 gem 'nokogiri'
 gem 'radius'
 gem 'rake'
-gem 'remotipart'
+# gem 'remotipart'
 gem 'resque' # background jobs
 gem 'resque-scheduler' # job scheduling
 gem 'resque-restriction'

app/assets/javascripts/ajax_form.js

@@ -2,6 +2,12 @@ $(document).on('click', '#ajax_form_submit', function(){
 	$('#ajaxForm').ajaxSubmit({
 		beforeSubmit: function(a,f,o) {
 			o.dataType = 'script';
+			if (o.dataType == 'script') {
+        o.url = o.url.split('?'); // split on GET params
+        if (o.url[0].substr(-3) != '.js') o.url[0] += '.js'; // force rails to respond to respond to the request with :format = js
+        o.url = o.url.join('?'); // join on GET params
+        alert(o.url)
+      }
 		}
 	});
 });

app/assets/javascripts/new_admin.js

@@ -17,4 +17,4 @@
 //= require side_bar_history
 //= require rss
 //= require ajax_form
-//= require jquery.remotipart
+//= require inc/ajax_setting

app/views/admin/assets/file_upload.html.erb

@@ -3,7 +3,7 @@
 
 <%= flash_messages %>
 
-<%= form_for :asset, :url => admin_assets_path(:uploader => true), :remote => true do |f| %>
+<%= form_for :asset, :url => admin_assets_path(:uploader => true), :html => {:id => 'ajaxForm', :multipart => true } do |f| %>
     <div class="modal-header">
         <h3><%= t 'admin.file_upload' %></h3>
     </div>
@@ -51,7 +51,7 @@
     </div>
     <div style="position: absolute; width: 100%; bottom: 0;">
         <div class="modal-footer">
-            <%= f.submit t(:create), :class => "btn btn-primary" %>
+            <a id='ajax_form_submit' class="btn btn-primary"><%= t(:create) %></a>
         </div>
     </div>