diff --git a/.htaccess b/.htaccess
index 3407952..1db4c62 100644
--- a/.htaccess
+++ b/.htaccess
@@ -9,6 +9,10 @@ RewriteCond %{HTTP_HOST} ^www\.html5demo\.com$ [NC,OR]
 RewriteCond %{HTTP_HOST} ^html5demo\.com$ [NC]
 RewriteRule ^(.*)$ http://html5demos.com/$1 [R=301,L]
 
+# RewriteCond %{HTTP_REFERER} ^$ [OR]
+# RewriteCond %{HTTP_REFERER} !^http://(www\.|offline\.)?html5demos.com/.*$
+# RewriteRule \.(gif|jpg|swf|flv|png|ogv|mp4|webm|js)$ [R=404,L]
+
 # if the file or directory does exist
 RewriteCond %{REQUEST_FILENAME} -d [OR]
 RewriteCond %{REQUEST_FILENAME} -f
diff --git a/css/html5demos.css b/css/html5demos.css
index f516e47..f7ed155 100644
--- a/css/html5demos.css
+++ b/css/html5demos.css
@@ -254,4 +254,4 @@ body.view-source #view-source {
   border: 1px solid #75784C;
   background: #FF7;  
   color: #333521;
-}
\ No newline at end of file
+}
diff --git a/demos/history.html b/demos/history.html
index 1911a6b..306d08d 100644
--- a/demos/history.html
+++ b/demos/history.html
@@ -60,7 +60,7 @@
   });
 }
 
-if (typeof history.pushState === 'undefined' || !('onpopstate' in window)) {
+if (typeof history.pushState === 'undefined' || !isEventSupported('popstate')) {
   state.className = 'fail';
 } else {
   state.className = 'success';
diff --git a/includes/footer.php b/includes/footer.php
index 84214b3..bf466bc 100644
--- a/includes/footer.php
+++ b/includes/footer.php
@@ -1,4 +1,3 @@
-
     <footer><a href="/">HTML5 demos</a>/<a id="built" href="http://twitter.com/rem">@rem built this</a>/<a href="#view-source">view source</a></footer> 
 </section>
 <a href="http://github.com/remy/html5demos"><img style="position: absolute; top: 0; left: 0; border: 0;" src="http://s3.amazonaws.com/github/ribbons/forkme_left_darkblue_121621.png" alt="Fork me on GitHub" /></a>
diff --git a/js/h5utils.js b/js/h5utils.js
index c1d20a6..b78a781 100644
--- a/js/h5utils.js
+++ b/js/h5utils.js
@@ -1,6 +1,15 @@
 // For discussion and comments, see: http://remysharp.com/2009/01/07/html5-enabling-script/
 /*@cc_on'abbr article aside audio canvas details figcaption figure footer header hgroup mark menu meter nav output progress section summary time video'.replace(/\w+/g,function(n){document.createElement(n)})@*/
 
+function isEventSupported(event, element) {
+  element = element || window;
+  var ok = 'on'+event in element;
+  if (ok) return ok;
+  element.setAttribute('on' + event, '');
+  ok = typeof(element['on'+event] == "function");
+  element.removeAttribute('on' + event);
+  return ok;
+}
 
 var addEvent = (function () {
   if (document.addEventListener) {