<html>
<body>
<p>Click the button to show the dialog.</p>
<button onclick="myFunction()">Show dialog</button>
<p><b>Note:</b> Use the "Esc" button to close the modal.</p>
<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>
function myFunction() {
document.getElementById("myDialog").showModal();
}
</script>
</body>
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</html>