Index: modules/comment/comment.js
===================================================================
RCS file: /cvs/drupal/drupal/modules/comment/comment.js,v
retrieving revision 1.13
diff -u -p -r1.13 comment.js
--- modules/comment/comment.js	9 Oct 2009 15:39:12 -0000	1.13
+++ modules/comment/comment.js	9 Oct 2009 17:13:48 -0000
@@ -3,12 +3,14 @@
 
 Drupal.behaviors.comment = {
   attach: function (context, settings) {
-    $.each(['name', 'homepage', 'mail'], function () {
-      var cookie = $.cookie('Drupal.visitor.' + this);
-      if (cookie) {
-        $('#comment-form input[name=' + this + ']', context).once('comment').val(cookie);
-      }
-    });
+    $('form#comment-form', context).once('comment', function () {
+      $.each(['name', 'mail'], function () {
+        var cookie = $.cookie('Drupal.visitor.' + this);
+        if (cookie) {
+          $('form#comment-form input[name=' + this + ']', context).val(cookie);
+        }
+      });
+    })
   }
 };
 
Index: modules/contact/contact.js
===================================================================
RCS file: /cvs/drupal/drupal/modules/contact/contact.js,v
retrieving revision 1.1
diff -u -p -r1.1 contact.js
--- modules/contact/contact.js	9 Oct 2009 15:39:12 -0000	1.1
+++ modules/contact/contact.js	9 Oct 2009 17:13:49 -0000
@@ -2,13 +2,15 @@
 (function ($) {
 
 Drupal.behaviors.contact = {
-  attach: function(context) {
-    $.each(['name', 'mail'], function () {
-      var cookie = $.cookie('Drupal.user.' + this);
-      if (cookie) {
-        $('#contact-site-form input[name=' + this + ']', context).once('comment').val(cookie);
-      }
-    });
+  attach: function (context, settings) {
+    $('form#contact-site-form', context).once('contact', function () {
+      $.each(['name', 'mail'], function () {
+        var cookie = $.cookie('Drupal.visitor.' + this);
+        if (cookie) {
+          $('form#contact-site-form input[name=' + this + ']', context).val(cookie);
+        }
+      });
+    })
   }
 };
 
Index: modules/user/user.js
===================================================================
RCS file: /cvs/drupal/drupal/modules/user/user.js,v
retrieving revision 1.18
diff -u -p -r1.18 user.js
--- modules/user/user.js	21 Sep 2009 08:52:41 -0000	1.18
+++ modules/user/user.js	9 Oct 2009 17:13:49 -0000
@@ -188,4 +188,17 @@ Drupal.behaviors.userSettings = {
   }
 };
 
+Drupal.behaviors.userRegistration = {
+  attach: function (context, settings) {
+    $('form#user-register', context).once('userRegistration', function () {
+      $.each(['name', 'mail'], function () {
+        var cookie = $.cookie('Drupal.visitor.' + this);
+        if (cookie) {
+          $('form#user-register input[name=' + this + ']', context).val(cookie);
+        }
+      });
+    })
+  }
+};
+
 })(jQuery);
Index: modules/user/user.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/user/user.module,v
retrieving revision 1.1060
diff -u -p -r1.1060 user.module
--- modules/user/user.module	10 Oct 2009 16:48:39 -0000	1.1060
+++ modules/user/user.module	10 Oct 2009 19:36:17 -0000
@@ -3080,6 +3080,9 @@ function user_register_form($form, &$for
     $form['account']['#type'] = 'markup';
   }
 
+  $form['#attached']['library'][] = array('system', 'cookie');
+  $form['#attached']['js'][] = drupal_get_path('module', 'user') . '/user.js';
+
   $form['submit'] = array(
     '#type' => 'submit',
     '#value' => t('Create new account'),