1<html xmlns="http://www.w3.org/1999/xhtml">
2  <head>
3    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
4    <title>aaa</title>
5  </head>
6  <body onload="boom();boom();">
7    <script>
8      function boom() {
9        if (document.getElementById('root').style.display != '') {
10          document.getElementById('root').style.display = '';
11        } else {
12          document.getElementById('root').style.display = 'none';
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14        document.body.clientWidth;
15      }
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17    <form>
18      <div id="root">
19        <table>
20          <tbody>
21            <tr>
22              <td style="border: 1px inset;">
23                <table>
24                  <tbody>
25                    <tr>
26                      <td style="border: 1px inset;">
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36                                          <tbody>
37                                            <tr>
38                                              <td style="border: 1px inset;">
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40                                                  <tbody>
41                                                    <tr>
42                                                      <td style="border: 1px inset;">
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46                                                          <td style="border: 1px inset;">
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62                                                          <td style="border: 1px inset;">
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74                                                          <td style="border: 1px inset;">
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78                                                          <td style="border: 1px inset;">
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82                                                          <td style="border: 1px inset;">
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86                                                          <td style="border: 1px inset;">
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90                                                          <td style="border: 1px inset;">
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94                                                          <td style="border: 1px inset;">
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98                                                          <td style="border: 1px inset;">
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102                                                          <td style="border: 1px inset;">
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106                                                          <td style="border: 1px inset;">
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110                                                          <td style="border: 1px inset;">
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114                                                          <td style="border: 1px inset;">
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134                                                          <td style="border: 1px inset;">
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138                                                          <td style="border: 1px inset;">
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142                                                          <td style="border: 1px inset;">
143                                                          <table>
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146                                                          <td style="border: 1px inset;">
147                                                          <br>
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255                                                </table>
256                                              </td>
257                                            </tr>
258                                          </tbody>
259                                        </table>
260                                      </td>
261                                    </tr>
262                                  </tbody>
263                                </table>
264                              </td>
265                            </tr>
266                          </tbody>
267                        </table>
268                      </td>
269                    </tr>
270                  </tbody>
271                </table>
272              </td>
273            </tr>
274          </tbody>
275        </table>
276      </div>
277    </form>
278  </body>
279</html>
280