html 获取table标签中的checked为true的项值

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">  <html>  <head>      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>      <title></title>      <script>          function test(o) {              if (!o.checked) {                  return;              }              var tr = o.parentNode.parentNode;              var tds = tr.cells;              var str = "you click ";              for(var i = 0;i < tds.length;i++){                  if (i < 3) {                      str = str + tds[i].innerHTML + "--";                  }              }              alert(str);          }      </script>  </head>  <body>  <table width="60%" cellspacing="0" cellpadding="0" align="left" border="1" bordercolordark="#ffffff" bordercolorlight="#B3B5B4" >      <tbody id="tabstore1">          <tr>              <td>b1</td>              <td>b2</td>              <td>b3</td>              <td><input type="checkbox" onclick="test(this);"/></td>          </tr>          <tr>              <td>c1</td>              <td>c2</td>              <td>c3-�ű�ѧ��</td>              <td><input type="checkbox" onclick="test(this);"/></td>          </tr>      </tbody>  </table>  </body>  </html>

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