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<title>マウスを載せると枠線が付く</title>
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<li><a href="http://www.w3.org/TR/REC-html40/">HTML 4.01</a></li>
<li><a href="http://www.w3.org/TR/xhtml1/">XHTML 1.0</a></li>
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<li><a href="http://www.w3.org/TR/REC-CSS2/">CSS level 2</a></li>
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