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Test Info:

<!DOCTYPE html>
<html class="reftest-wait">
<!-- Test: Remove the required attribute to an input element
to make it optional. -->
<link rel='stylesheet' type='text/css' href='css-optional-style.css'>
<script type="text/javascript">
function removeRequired()
{
document.getElementById('i').removeAttribute('required');
}
function disableReftestWait()
{
document.documentElement.className = '';
}
</script>
<body onload="removeRequired(); disableReftestWait();">
<input id="i" required>
</body>
</html>