<!DOCTYPE html> <html class="reftest-wait"> <head> <body style="white-space:pre"> 00 BC FG JK <script> document.body.offsetTop; var t = document.body.firstChild; var sel = window.getSelection(); sel.collapse(t, 11); sel.extend(t, 13); function doTest() { t.replaceData(0, 5, ''); document.documentElement.removeAttribute('class'); } document.addEventListener("MozReftestInvalidate", doTest, false); </script> </body> </html>