<!DOCTYPE html> <html class="reftest-wait"> <head> <script> function doTest() { document.getElementById('t').removeAttribute('disabled'); document.getElementById('t').value = ''; document.documentElement.className=''; } document.addEventListener("MozReftestInvalidate", doTest, false); </script> </head> <!-- Test: if textarea is not disabled and its value has been modifie, it should be affected by :-moz-ui-valid pseudo-class. --> <link rel='stylesheet' type='text/css' href='style.css'> <body> <textarea class='valid' id='t' disabled></textarea> </body> </html>