1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
<!DOCTYPE html> <style> div { height: 240px; } #f { height: 0; overflow: hidden; padding: 0; border: none; } </style> There should be a visible fieldset below: <div> <fieldset id="f">This is fieldset</fieldset> </div> <script> h = document.body.clientHeight; f.style.height = "auto"; </script>