最好是循环写出来 谢谢了
<ul>
       <li><a href="#1">技术区</a>
          <ul>
            <li><a href="#">网页技术</a>
              <ul>
                <li class="Child"><a href="#">JavaScript</a></li>
                <!--Child Node-->
                <li class="Child"><a href="#">HTML/XHTML/CSS</a></li>
                <li class="Child"><a href="#">Ajax</a></li>
                <li class="Child"><a href="#">网页制作工具</a></li>
                <li class="Child"><a href="#">设计/图形</a></li>
                <li class="Child"><a href="#">Flash/多媒体</a></li>
                <li class="Child"><a href="#">VML/Web3D</a></li>
              </ul>
            </li>
            <!--Sub Node 3-->
            <li><a href="#">Web编程</a>
              <ul>
                <li class="Child"><a href="#">Java</a></li>
                <!--Child Node-->
                <li class="Child"><a href="#">.Net</a></li>
                <li class="Child"><a href="#">ASP/VBScript</a></li>
                <li class="Child"><a href="#">PHP</a></li>
                <li class="Child"><a href="#">Perl/Python</a></li>
                <li class="Child"><a href="#">Web综合/开源</a></li>
              </ul>
            </li>
            <!--Sub Node 3-->
          </ul>
        </li>
        <li><a href="#1">二级目录</a>
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            <li><a href="#">三级目录</a>
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                <li><a href="#">四级目录</a>
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                    <li><a href="#">五级目录</a>
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                        <li><a href="#">......</a>
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                            <li><a href="#">第n级目录</a>
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                                <li class="Child"><a href="#">叶结点1</a></li>
                                <!--Child Node-->
                                <li class="Child"><a href="#">叶结点2</a></li>
                                <li class="Child"><a href="#">叶结点3</a></li>
                              </ul>
                            </li>
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                          </ul>
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                        <!--Sub Node 6 -->
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                    <!--Sub Node 5 -->
                  </ul>
                </li>
                <!--Sub Node 4-->
              </ul>
            </li>
            <!--Sub Node 3-->
          </ul>
        </li>
        <!--Sub Node 2-->
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