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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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</head>
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<body>
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<table border="1"><tbody><tr id="tr">XXX<td>TD</td></tr></tbody></table>
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<script>
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document.body.offsetWidth;
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document.getElementById("tr").firstChild.data = '';
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</script>
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</body>
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</html>
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