<html> <head> <script> function test() { if (window.testRunner) testRunner.dumpAsText(); var ruby = document.getElementById("t"); ruby.innerHTML = ''; // This line mustn't crash document.getElementById("result").firstChild.data = 'SUCCESS!'; } </script> </head> <body onload="test()"> <div id="t"><ruby>f</div> <div id="result">FAILED!</div> </body> </html>