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<table class="tb1_table">
<thead>
<tr>
<th>Col 1</th>
<th>Col 2</th>
<th>Col 3</th>
<th>Col 4</th>
<th>Col 5</th>
</tr>
</thead>
<tbody>
<tr colspan="5">
<td>
<div class="dv_table">
<table class="tb2_table">
<td>row 1-1</td>
<td>row 1-2</td>
<td>row 1-3</td>
<td>row 1-4</td>
<td>row 1-5</td>
<td>row 2-1</td>
<td>row 2-2</td>
<td>row 2-3</td>
<td>row 2-4</td>
<td>row 2-5</td>
<td>row 3-1</td>
<td>row 3-2</td>
<td>row 3-3</td>
<td>row 3-4</td>
<td>row 3-5</td>
<td>row 4-1</td>
<td>row 4-2</td>
<td>row 4-3</td>
<td>row 4-4</td>
<td>row 4-5</td>
<td>row 5-1</td>
<td>row 5-2</td>
<td>row 5-3</td>
<td>row 5-4</td>
<td>row 5-5</td>
<td>row 6-1</td>
<td>row 6-2</td>
<td>row 6-3</td>
<td>row 6-4</td>
<td>row 6-5</td>
<td>row 7-1</td>
<td>row 7-2</td>
<td>row 7-3</td>
<td>row 7-4</td>
<td>row 7-5</td>
</tbody>
</table>
</div>
</td>
输入 JavaScript 代码……
xxxxxxxxxx
.tb1_table{
width: 500px;
table-layout: fixed;
border-collapse: collapse;
}
.tb1_table thead {
background: black;
color:#fff;
.dv_table{
height: 100px;
overflow: auto;
.tb2_table td {
text-align: center;
width: 200px;
