Baduymda

<textarea id="source"></textarea> <button id="action">Run</button> <iframe id="destination"></iframe> <script> var source = document.getElementById("source"); var destination = document.getElementById("destination"); var button = document.getElementById("action"); button.addEventListener("click", run, false); function run() { var d = destination.contentDocument; d.open(); d.write(source.value); d.close(); } </script> thanks