让网站自动生成章节目录索引的多个js代码(3)

<script language="javascript" type="text/javascript">
 //生成目录索引列表
 function GenerateContentList() {
  var jquery_h1_list = $('#content h2');
  if (jquery_h1_list.length == 0) { return; }
  if ($('#content').length == 0) { return; }

  var content = '<a name="_labelTop"></a>';
  content += '<div id="navCategory">';
  content += '<p style="font-size:18px"><b>目录</b></p>';
  // 一级目录 start
  content += '<ul class="first_class_ul">';

  for (var i = 0; i < jquery_h1_list.length; i++) {
  var go_to_top = '<div style="text-align: right"><a name="_label' + i + '"></a></div>';
  $(jquery_h1_list[i]).before(go_to_top);

  // 一级目录的一条
  var li_content = '<li><a href="#_label' + i + '" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >' + $(jquery_h1_list[i]).text() + '</a></li>';

  var nextH1Index = i + 1;
  if (nextH1Index == jquery_h1_list.length) { nextH1Index = 0; }
  var jquery_h2_list = $(jquery_h1_list[i]).nextUntil(jquery_h1_list[nextH1Index], "h3");
  // 二级目录 start
  if (jquery_h2_list.length > 0) {
   //li_content +='<ul style="list-style-type:none; text-align: left; margin:2px 2px;">';
   li_content += '<ul class="second_class_ul">';
  }
  for (var j = 0; j < jquery_h2_list.length; j++) {
   var go_to_top2 = '<div style="text-align: right"><a name="_lab2_' + i + '_' + j + '"></a></div>';
   $(jquery_h2_list[j]).before(go_to_top2);
   // 二级目录的一条
   li_content += '<li><a href="#_lab2_' + i + '_' + j + '" rel="external nofollow" >' + $(jquery_h2_list[j]).text() + '</a></li>';

   var nextH2Index = j + 1;
   var next;
   if (nextH2Index == jquery_h2_list.length) {
   if (i + 1 == jquery_h1_list.length) {
    next = jquery_h1_list[0];
   }
   else {
    next = jquery_h1_list[i + 1];
   }
   }
   else {
   next = jquery_h2_list[nextH2Index];
   }
   var jquery_h3_list = $(jquery_h2_list[j]).nextUntil(next, "h4");
   // 三级目录 start
   if (jquery_h3_list.length > 0) {
   li_content += '<ul class="third_class_ul">';
   }

   for (var k = 0; k < jquery_h3_list.length; k++) {
   var go_to_third_Content = '<div style="text-align: right"><a name="_label3_' + i + '_' + j + '_' + k + '"></a></div>';
   $(jquery_h3_list[k]).before(go_to_third_Content);
   // 三级目录的一条
   li_content += '<li><a href="#_label3_' + i + '_' + j + '_' + k + '" rel="external nofollow" >' + $(jquery_h3_list[k]).text() + '</a></li>';
   }

   if (jquery_h3_list.length > 0) {
   li_content += '</ul>';
   }
   li_content += '</li>';
   // 三级目录 end
  }
  if (jquery_h2_list.length > 0) {
   li_content += '</ul>';
  }
  li_content += '</li>';
  // 二级目录 end

  content += li_content;
  }
  // 一级目录 end
  content += '</ul>';
  content += '</div>';

  $($('#content')[0]).prepend(content);
 }

 GenerateContentList();
 </script>