博客园博客自动生成三级目录(generate three levels content using JS in cnblogs)

博客园博客自动生成三级目录(generate three levels content using JS in cnblogs)

JS代码（JS code)

最近参考了（http://www.cnblogs.com/wangqiguo/p/4355032.html）自动生成目录的方法，我增加了能够自动生成三级目录的JS代码。

I learned from (http://www.cnblogs.com/wangqiguo/p/4355032.html) about generating content using JS in cnblogs. I updated the code to generate three levels content.

 1 <script language="javascript" type="text/javascript">
 2 //生成目录索引列表
 3 function GenerateContentList()
 4 {
 5     var jquery_h1_list = $('#cnblogs_post_body h1');
 6     if (jquery_h1_list.length == 0) { return; }
 7     if ($('#cnblogs_post_body').length == 0) { return; }
 8 
 9     var content = '<a name="_labelTop"></a>';
10     content    += '<div id="navCategory">';
11     content    += '<p style="font-size:18px"><b>阅读目录(Content)</b></p>';
12     // 一级目录 start
13     content += '<ul class="first_class_ul">';
14 
15     for (var i = 0; i < jquery_h1_list.length; i++)
16     {
17         var go_to_top = '<div style="text-align: right"><a href="#_labelTop">回到顶部(go to top)</a><a name="_label' + i + '"></a></div>';
18         $(jquery_h1_list[i]).before(go_to_top);
19 
20         // 一级目录的一条
21         var li_content = '<li><a href="#_label' + i + '">' + $(jquery_h1_list[i]).text() + '</a></li>';
22 
23         var nextH1Index = i + 1;
24         if (nextH1Index == jquery_h1_list.length) { nextH1Index = 0; }
25         var jquery_h2_list = $(jquery_h1_list[i]).nextUntil(jquery_h1_list[nextH1Index], "h2");
26         // 二级目录 start
27         if (jquery_h2_list.length > 0)
28         {
29             //li_content +='<ul style="list-style-type:none; text-align: left; margin:2px 2px;">';
30             li_content += '<ul class="second_class_ul">';
31         }
32         for (var j = 0; j < jquery_h2_list.length; j++)
33         {
34             var go_to_top2 = '<div style="text-align: right"><a name="_lab2_'+ i + '_' + j + '"></a></div>';
35             $(jquery_h2_list[j]).before(go_to_top2);
36             // 二级目录的一条
37             li_content +='<li><a href="#_lab2_'+ i +'_' + j + '">' + $(jquery_h2_list[j]).text() + '</a></li>';
38 
39             var nextH2Index = j + 1;
40             var next;
41             if (nextH2Index == jquery_h2_list.length) 
42             {
43                 if (i + 1 == jquery_h1_list.length)
44                 {
45                     next = jquery_h1_list[0];
46                 }
47                 else
48                 {
49                     next = jquery_h1_list[i + 1];
50                 }
51             }
52             else
53             {
54                 next = jquery_h2_list[nextH2Index];
55             }
56             var jquery_h3_list = $(jquery_h2_list[j]).nextUntil(next, "h3");
57             // 三级目录 start
58             if (jquery_h3_list.length > 0)
59             {
60                 li_content += '<ul class="third_class_ul">';
61             }
62             
63             for (var k = 0; k < jquery_h3_list.length; k++)
64             {
65                 var go_to_third_Content = '<div style="text-align: right"><a name="_label3_' + i + '_' + j + '_' + k + '"></a></div>';
66                 $(jquery_h3_list[k]).before(go_to_third_Content);
67                 // 三级目录的一条
68                 li_content += '<li><a href="#_label3_' + i + '_' + j + '_' + k + '">' + $(jquery_h3_list[k]).text() + '</a></li>';
69             }
70             
71             if (jquery_h3_list.length > 0)
72             {
73                 li_content += '</ul>';
74             }
75             li_content += '</li>';
76             // 三级目录 end
77         }
78         if (jquery_h2_list.length > 0)
79         {
80             li_content +='</ul>';
81         }
82         li_content +='</li>';
83         // 二级目录 end
84 
85         content += li_content;
86     }
87     // 一级目录 end
88     content += '</ul>';
89     content += '</div>';
90 
91     $($('#cnblogs_post_body')[0]).prepend(content);
92 }
93 
94 GenerateContentList();
95 </script>