<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>