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<html>
<body>
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$(document).ready(function(){
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<table id="mytable" border="1" cellpadding="0"
cellspacing="0" bordercolor="#a3b0dc" style="border-collapse:collapse;">
<tr >
<td width="200">第一列<a href="#" id="category">try</a></td>
<td width="200">第二列<a href="#" id="category">try</a></td>
<td width="200">第三列<a href="#" id="category">try</a></td>
<td width="200">第四列<a href="#" id="category">try</a></td>
<td width="200">第五列<a href="#" id="category">try</a></td>
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<tr>
<td class="a">id</td>
<td>id1</td>
<td>id2</td>
<td>id3</td>
<td>id4</td>
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<td class="a">id</td>
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<td>id3</td>
<td>id4</td>
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<td class="a">id</td>
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<td>id3</td>
<td>id4</td>
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<tr>
<td class="a">id</td>
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<td>id2</td>
<td>id3</td>
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<tr>
<td class="a">id</td>
<td>id1</td>
<td>id2</td>
<td>id3</td>
<td>id4</td>
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</body>
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<html>
<body>
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<table id="mytable" border="1" cellpadding="0"
cellspacing="0" bordercolor="#a3b0dc" style="border-collapse:collapse;">
<tr>
<th width="200">第一列<a href="#" onclick="test(1)">try</a></th>
<th width="200">第二列<a href="#" onclick="test(2)">try</a></th>
<th width="200">第三列<a href="#" onclick="test(3)">try</a></th>
<th width="200">第四列<a href="#" onclick="test(4)">try</a></th>
<th width="200">第五列<a href="#" onclick="test(5)">try</a></th>
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<tr>
<td class="a">id</td>
<td>id1</td>
<td>id2</td>
<td>id3</td>
<td>id4</td>
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<tr>
<td class="a">id</td>
<td>id1</td>
<td>id2</td>
<td>id3</td>
<td>id4</td>
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<tr>
<td class="a">id</td>
<td>id1</td>
<td>id2</td>
<td>id3</td>
<td>id4</td>
</tr>
<tr>
<td class="a">id</td>
<td>id1</td>
<td>id2</td>
<td>id3</td>
<td>id4</td>
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<tr>
<td class="a">id</td>
<td>id1</td>
<td>id2</td>
<td>id3</td>
<td>id4</td>
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<html>
<body>
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function test(num)
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<table id="mytable" border="1" cellpadding="0"
cellspacing="0" bordercolor="#a3b0dc" style="border-collapse:collapse;">
<tr >
<th width="200">第一列<a href="#" onclick="test(1)">try</a></th>
<th width="200">第二列<a href="#" onclick="test(2)">try</a></th>
<th width="200">第三列<a href="#" onclick="test(3)">try</a></th>
<th width="200">第四列<a href="#" onclick="test(4)">try</a></th>
<th width="200">第五列<a href="#" onclick="test(5)">try</a></th>
</tr>
<tr>
<td class="a">id</td>
<td>id1</td>
<td>id2</td>
<td>id3</td>
<td>id4</td>
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<tr>
<td class="a">id</td>
<td>id1</td>
<td>id2</td>
<td>id3</td>
<td>id4</td>
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<tr>
<td class="a">id</td>
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<td>id2</td>
<td>id3</td>
<td>id4</td>
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<tr>
<td class="a">id</td>
<td>id1</td>
<td>id2</td>
<td>id3</td>
<td>id4</td>
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<tr>
<td class="a">id</td>
<td>id1</td>
<td>id2</td>
<td>id3</td>
<td>id4</td>
</tr>
</table>
</body>
</html>