diff --git a/plugin/postmessage/iframe_example.html b/plugin/postmessage/iframe_example.html
new file mode 100644
index 0000000000000000000000000000000000000000..6e5709d07f5cd88c399eeb863f85fbe4d470f375
--- /dev/null
+++ b/plugin/postmessage/iframe_example.html
@@ -0,0 +1,34 @@
+<html>
+<body>
+ <iframe id="reveal" src="reveal.js/index.html" width="500" height="500"></iframe>
+<div>
+<input id="back" type="button" value="go back"/>
+<input id="ahead" type="button" value="go ahead"/>
+<input id="slideto" type="button" value="slideto 2-2"/>
+</div>
+<script>
+(function (){
+ var back = document.getElementById('back'),
+ ahead = document.getElementById('ahead'),
+ slideto = document.getElementById('slideto'),
+ reveal = window.frames[0];
+
+ back.addEventListener('click', function (){
+
+ reveal.postMessage(JSON.stringify({method: 'prev', args: []}), '*');
+ },false);
+
+ ahead.addEventListener('click', function (){
+ reveal.postMessage(JSON.stringify({method: 'next', args: []}), '*');
+ },false);
+
+ slideto.addEventListener('click', function (){
+
+ reveal.postMessage(JSON.stringify({method: 'slide', args: [2,2]}), '*');
+ },false);
+
+}());
+
+</script>
+</body>
+</html>
diff --git a/plugin/postmessage/postmessage.js b/plugin/postmessage/postmessage.js
new file mode 100644
index 0000000000000000000000000000000000000000..176d2306ecf7254fe0ce2ae81e4a178d56a6f9c2
--- /dev/null
+++ b/plugin/postmessage/postmessage.js
@@ -0,0 +1,40 @@
+/*
+simple postmessage plugin
+
+Useful when a reveal slideshow is inside an iframe.
+It allows to call reveal methods from outside.
+
+Example:
+ var reveal = window.frames[0];
+
+ // Reveal.prev();
+ reveal.postMessage(JSON.stringify({method: 'prev', args: []}), '*');
+ // Reveal.next();
+ reveal.postMessage(JSON.stringify({method: 'next', args: []}), '*');
+ // Reveal.slide(2, 2);
+ reveal.postMessage(JSON.stringify({method: 'slide', args: [2,2]}), '*');
+
+Add to the slideshow:
+
+ dependencies: [
+ ...
+ { src: 'plugin/postmessage/postmessage.js', async: true, condition: function() { return !!document.body.classList; } }
+ ]
+
+
+*/
+
+(function (){
+
+window.addEventListener("message", function (event){
+ var data = JSON.parse(event.data),
+ method = data.method,
+ args = data.args;
+ if (Reveal[method]){
+ Reveal[method].apply(Reveal, data.args);
+ }
+}, false);
+}());
+
+
+