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节点的操作

 1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 2 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
 3 <head>
 4     <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
 5     <title>节点操作</title>
 6     <script type="text/javascript">
 7     // table节点
 8     function read_node_table()
 9     {
10         var node_body = document.body;
11         var node_table = node_body.firstChild;
12         alert(node_table.nodeName);
13     }
14     // tr节点
15     function read_node_tr()
16     {
17         var node_body = document.body;
18         var node_table = node_body.firstChild;
19         var node_tbody = node_table.firstChild;
20         var node_trs = node_tbody.childNodes;
21         alert(node_trs[1].nodeName);
22     }
23     // td节点
24     function edit_node_td(){
25         var node_body = document.body;
26         var node_table = node_body.firstChild;
27         var node_tbody = node_table.firstChild;
28         var node_trs = node_tbody.childNodes;
29         var node_tds = node_trs[1].childNodes;
30         var node_text = node_tds[2].firstChild;
31         node_text.nodeValue = "2016-12-31";        
32     }
33     </script>
34 </head>
35 <body><table border="1" rules="all"><tr><td>编号</td><td>新闻标题</td><td>发布日期</td></tr><tr><td>1234</td><td>广州传智播客</td><td>2016-12-12</td></tr></table>
36     <input type="button" value="访问table节点" onclick="read_node_table()" />
37     <input type="button" value="访问tr节点" onclick="read_node_tr()" />
38     <input type="button" value="修改日期" onclick="edit_node_td()" />
39 </body>
40 </html>

 

节点的操作