鼠标移上元素显示大图

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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>鼠标划过展示大图</title>
<style type="text/css">
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#hideBox a { display:block; height:100%; width:100%; }
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</script>
</head>
<body>
<div class="wrap">
	<table>
		<tr>
			<td><div><b>15</b><a id="g1" class="s" href="#">名称1</a></div></td>
			<td><div><b>16</b><a id="g2" href="#">名称2</a><br />
					<a id="g3" href="#">名称3</a></div></td>
			<td><div><b>15</b><a id="g3" class="s" href="#">名称1</a></div></td>
			<td><div><b>15</b><a id="g4" class="s" href="#">名称1</a></div></td>
		</tr>
		<tr>
			<td><div><b>15</b><a id="g5" class="s" href="#">名称1</a></div></td>
			<td><div><b>15</b><a id="g6" class="s" href="#">名称1</a></div></td>
			<td><div><b>16</b><a id="g7" href="#">名称2</a><br />
					<a id="g8" href="#">名称3</a></div></td>
			<td><div><b>16</b><a id="g9" href="#">名称2</a><br />
					<a id="g3" href="#">名称3</a></div></td>
		</tr>
		<tr>
			<td><div><b>16</b><a id="g11" href="#">名称2</a><br />
					<a id="g12" href="#">名称3</a></div></td>
			<td><div><b>16</b><a id="g13" href="#">名称2</a><br />
					<a id="g14" href="#">名称3</a></div></td>
			<td><div><b>15</b><a id="g15" class="s" href="#">名称1</a></div></td>
			<td><div><b>15</b><a id="g16" class="s" href="#">名称1</a></div></td>
		</tr>
	</table>
	<div id="hideBox"><a href="">大图展示</a></div>
</div>
</body>
</html>