<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <script> function test() { var ruby = document.getElementById('R'); var span = document.getElementById('ML'); var newRT = document.createElement('rt'); var newRTText = document.createTextNode('Hyper-text'); newRT.appendChild(newRTText); ruby.insertBefore(newRT, span); } </script> </head> <body onload="test()"> <p>The following is a test for DOM manipulation within <ruby>: Inserting a new <rt> element</p> <p>Both lines should look identical (the first line is the one manipulated).</p> <br> <br> <p><ruby> is defined in the <ruby id="R"><span>HT</span><span id="ML">ML</span><rt>Markup Language</rt>5</ruby> spec.</p> <p><ruby> is defined in the <ruby><span>HT</span><rt>Hyper-text</rt><span>ML</span><rt>Markup Language</rt>5</ruby> spec.</p> </body> </html>