<!DOCTYPE HTML><html><head> <script type="text/javascript" src="/tests/SimpleTest/EventUtils.js"></script> </head> <body> <textarea id="target" style="height: 100px; -moz-appearance: none" spellcheck="false" onkeydown="this.style.display='block';this.style.height='200px';">foo</textarea> <script> var t = document.querySelector("textarea"); t.focus(); t.selectionStart = t.selectionEnd = t.value.length; sendKey('RETURN'); document.body.appendChild(document.createTextNode(t.selectionStart + " - " + t.selectionEnd)); </script> </body> </html>