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