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<!DOCTYPE html> <html class='reftest-wait'> <head> <style> :-moz-submit-invalid { display: none; } </style> </head> <script> function onloadHandler() { document.getElementById('i').type = 'text'; document.documentElement.className = ''; } </script> <body onload='onloadHandler();'> <form> <input required> <input id='i' type='image'> </form> </body> </html>