23 lines
580 B
HTML
23 lines
580 B
HTML
<!DOCTYPE html>
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<!-- fieldset with one valid element and you dynamically add a barred constraint
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validation element -->
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<html>
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<head>
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<style>
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fieldset:invalid { display:none }
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</style>
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<script>
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function onLoadHandler()
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{
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document.getElementById("fieldset").appendChild(document.getElementById('i'));
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document.documentElement.className='';
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}
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</script>
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</head>
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<body onload='onLoadHandler();'>
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<input id='i' value='foo' readonly>
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<fieldset id="fieldset">
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<input required>
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</fieldset>
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</body>
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</html>
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