зеркало из https://github.com/mozilla/gecko-dev.git
30 строки
435 B
HTML
30 строки
435 B
HTML
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<!DOCTYPE html>
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<html>
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<head>
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<style type="text/css">
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#sibling1 {
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height: 20px;
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background-color: green;
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margin-bottom: 10px;
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}
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#sibling2 {
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display: none;
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height: 20px;
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background-color: green;
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margin-top: 20px;
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margin-bottom: 10px;
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}
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#sibling3 {
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height: 20px;
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background-color: green;
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margin-top: 20px;
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}
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</style>
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</head>
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<body>
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<div id="sibling1"></div>
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<div id="sibling2"></div>
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<div id="sibling3"></div>
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</body>
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</html>
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