如何是用JS 获取：<head></head>里面所有的东西


<table>
<head>
<tr>
<th>123</th>
</tr>
<tr>
<th>22</th>
</tr>
</head>
<tbody><tr>
<td>123</td>
</tr>
<tr>
<td>123</td>
</tr></tbody></table> 取到的值应该是（“<tr><th>123</th></tr><tr><th>22</th></tr>”）

解决方案 »

  1.   

    定义表头应该使用<thead>标签而不是<head>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>无标题文档</title>
    </head><body>
    <table>
    <thead>
    <tr>
    <th>123</th>
    </tr>
    <tr>
    <th>22</th>
    </tr>
    </thead>
    <tbody>
    <tr>
    <td>123</td>
    </tr>
    <tr>
    <td>123</td>
    </tr>
    </tbody>
    </table>
    <script type="text/javascript">
    var thead = document.getElementsByTagName('thead')[0].innerHTML;
    alert(thead);
    </script>
    </body>
    </html>