<html>

<body>

        <iframe id="reveal" src="../../index.html" style="border: 0;" 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>