diff --git a/actionpack/CHANGELOG b/actionpack/CHANGELOG
index 5d9c228007..07dc50d398 100644
--- a/actionpack/CHANGELOG
+++ b/actionpack/CHANGELOG
@@ -1,5 +1,7 @@
 *SVN*
 
+* Fixed link_to "somewhere", :post => true to produce valid XHTML by using the parentnode instead of document.body for the instant form #3007 [Bob Silva]
+
 * Added :function option to PrototypeHelper#observe_field/observe_form that allows you to call a function instead of submitting an ajax call as the trigger #4268 [jonathan@daikini.com]
 
 * Make Mime::Type.parse consider q values (if any) [Jamis Buck]
diff --git a/actionpack/lib/action_view/helpers/url_helper.rb b/actionpack/lib/action_view/helpers/url_helper.rb
index b3dd58370e..1abe1b1220 100644
--- a/actionpack/lib/action_view/helpers/url_helper.rb
+++ b/actionpack/lib/action_view/helpers/url_helper.rb
@@ -269,7 +269,7 @@ module ActionView
         end
         
         def post_javascript_function
-          "var f = document.createElement('form'); document.body.appendChild(f); f.method = 'POST'; f.action = this.href; f.submit();"
+          "var f = document.createElement('form'); this.parentNode.appendChild(f); f.method = 'POST'; f.action = this.href; f.submit();"
         end
 
         # Processes the _html_options_ hash, converting the boolean
diff --git a/actionpack/test/template/url_helper_test.rb b/actionpack/test/template/url_helper_test.rb
index 25ab89a584..85ce24b1c2 100644
--- a/actionpack/test/template/url_helper_test.rb
+++ b/actionpack/test/template/url_helper_test.rb
@@ -110,14 +110,14 @@ class UrlHelperTest < Test::Unit::TestCase
   
   def test_link_tag_using_post_javascript
     assert_dom_equal(
-      "<a href=\"http://www.example.com\" onclick=\"var f = document.createElement('form'); document.body.appendChild(f); f.method = 'POST'; f.action = this.href; f.submit();return false;\">Hello</a>",
+      "<a href=\"http://www.example.com\" onclick=\"var f = document.createElement('form'); this.parentNode.appendChild(f); f.method = 'POST'; f.action = this.href; f.submit();return false;\">Hello</a>",
       link_to("Hello", "http://www.example.com", :post => true)
     )
   end
   
   def test_link_tag_using_post_javascript_and_confirm
     assert_dom_equal(
-      "<a href=\"http://www.example.com\" onclick=\"if (confirm('Are you serious?')) { var f = document.createElement('form'); document.body.appendChild(f); f.method = 'POST'; f.action = this.href; f.submit(); };return false;\">Hello</a>",
+      "<a href=\"http://www.example.com\" onclick=\"if (confirm('Are you serious?')) { var f = document.createElement('form'); this.parentNode.appendChild(f); f.method = 'POST'; f.action = this.href; f.submit(); };return false;\">Hello</a>",
       link_to("Hello", "http://www.example.com", :post => true, :confirm => "Are you serious?")
     )    
   end