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自定义长度菜单的选项

使用lengthMenu选项来初始化选项，此选项支持两种参数方式，一种是一维数组，一种是二维数组，此例子演示的是二维数组的用法

NamePositionOfficeAgeStart dateSalary
NamePositionOfficeAgeStart dateSalary
Airi Satou Accountant Tokyo 33 2008/11/28 $162,700
Airi Satou Accountant Tokyo 33 2008/11/28 $162,700
Showing 1 to 2 of 39 entries
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$(document).ready(function() {
    $('#example').dataTable({
        "lengthMenu": [[2, 4, 6, -1], [2, 4, 6, "All"]]
    });
});
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<table id="example" class="display" cellspacing="0" width="100%">
<thead>
<tr>
    <th>Name</th>
    <th>Position</th>
    <th>Office</th>
    <th>Age</th>
    <th>Start date</th>
    <th>Salary</th>
</tr>
</thead>
 
<tfoot>
<tr>
    <th>Name</th>
    <th>Position</th>
    <th>Office</th>
    <th>Age</th>
    <th>Start date</th>
    <th>Salary</th>
</tr>
</tfoot>
 
<tbody>
<tr>
    <td>Tiger Nixon</td>
    <td>System Architect</td>
    <td>Edinburgh</td>
    <td>61</td>
    <td>2011/04/25</td>
    <td>$320,800</td>
</tr>
<tr>
    <td>Garrett Winters</td>
    <td>Accountant</td>
    <td>Tokyo</td>
    <td>63</td>
    <td>2011/07/25</td>
    <td>$170,750</td>
</tr>
<tr>
    <td>Ashton Cox</td>
    <td>Junior Technical Author</td>
    <td>San Francisco</td>
    <td>66</td>
    <td>2009/01/12</td>
    <td>$86,000</td>
</tr>
<tr>
    <td>Cedric Kelly</td>
    <td>Senior Javascript Developer</td>
    <td>Edinburgh</td>
    <td>22</td>
    <td>2012/03/29</td>
    <td>$433,060</td>
</tr>
<tr>
    <td>Airi Satou</td>
    <td>Accountant</td>
    <td>Tokyo</td>
    <td>33</td>
    <td>2008/11/28</td>
    <td>$162,700</td>
</tr>
<tr>
    <td>Brielle Williamson</td>
    <td>Integration Specialist</td>
    <td>New York</td>
    <td>61</td>
    <td>2012/12/02</td>
    <td>$372,000</td>
</tr>
<tr>
    <td>Herrod Chandler</td>
    <td>Sales Assistant</td>
    <td>San Francisco</td>
    <td>59</td>
    <td>2012/08/06</td>
    <td>$137,500</td>
</tr>
</tbody>
</table>

http://datatables.net/examples/advanced_init/length_menu.html

Translation from DataTables.net, with permission