W3Schools Tryit Editor

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<h2>border-top-left-radius: 25px:</h2>
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<p>The border-top-left-radius property defines the radius of the top-left corner.</p>
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<h2>border-top-left-radius: 50px 20px:</h2>
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<p>If two values are set; the first one is for the top border, the second one for the left border.</p>
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<form action="/index.cgi/larger-text" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="http://www.w3schools.com/cssref/tryit.php?filename=trycss3_border-top-left-radius">(->オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="http://www.w3schools.com/cssref/tryit.php?filename=trycss3_border-top-left-radius" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast">配色反転</option>
<option value="larger-text" selected="selected">文字拡大</option>
<option value="mobile">モバイル</option>
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<input type="submit" value="表示" />
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</form>
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