我想依据 html 字符串动态的创建 document 对象,然后使用 getElementById 等方法获取我想要的内容。例如,我想从下面的字符串中提取 div1 的 内容:======================================<!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>
  <title>
    无标题页
  </title>
</head>
<body>
  <form name="form1" method="post" action="GridView.aspx" id="form1">
    <div>
      <input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwUJNjc2NTE4NTMzZBgBBQlHcmlkVmlldzEPZ2TtAKr8y11Z/GJxY3ofctOiabi30g==" />
    </div>    <div id="div1">
      <table cellspacing="0" rules="all" border="1" id="GridView1" style="border-collapse:collapse;">
        <tr>
          <th scope="col">UserId</th>
          <th scope="col">UserPwd</th>
        </tr>
        <tr>
          <td>user1</td><td>pwd1</td>
        </tr>
        <tr>
          <td>user2</td><td>pwd2</td>
        </tr>
      </table>
    </div>
  </form>
</body>
</html>