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<html>
<body id="myBody">
<button onclick="alert(document.body.bottomMargin);">Bottom Margin</button></body>
<button onclick="alert(document.body.topMargin);">Top Margin</button></body>
<button onclick="alert(document.body.leftMargin);">Left Margin</button></body>
<button onclick="alert(document.body.rightMargin);">Right Margin</button>
</body>
</html>
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