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<!DOCTYPE html> <html> <body> <p>Click the buttons to show and/or close the dialog window.</p> <button onclick="showDialog()">Show dialog</button> <button onclick="closeDialog()">Close dialog</button> <p><b>Note:</b> The dialog element is only supported in Chrome 37+, Safari 6+ and Opera 24+.</p> <dialog id="myDialog">This is a dialog window</dialog> <script> var x = document.getElementById("myDialog"); function showDialog() { x.show(); } function closeDialog() { x.close(); } </script> </body> </html>