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<html><head><link id="myLink" href="domoarigato.htm" hreflang="ja"></head><body><p>Click the button to return the language code of the linked document.</p><p>The hreflang attribute does not render as anything special in any of the major browsers. However, it can be used by search engines, or in scripts.</p><button onclick="myFunction()">Try it</button><p id="demo"></p><script>function myFunction() { var x = document.getElementById("myLink").hreflang; document.getElementById("demo").innerHTML = x;}</script></body></html>