anchor.diff:                  <div class="navigation_col">
                       <!--navigation_col侧导航栏-->
                       <ul>
  -                        <li class="navigation_col_li" id="navigation_col_index">首页</li>
  -                        <li class="navigation_col_li">功能</li>
  -                        <li class="navigation_col_li">帮助</li>
  -                        <li class="navigation_col_li">关于</li>
  +                        <li class="navigation_col_li navigation_col_li_active" id="navigation_col_index">首页</li>
  +                        <li class="navigation_col_li navigation_col_li_normal">功能</li>
  +                        <li class="navigation_col_li navigation_col_li_normal">帮助</li>
  +                        <li class="navigation_col_li navigation_col_li_normal">关于</li>
                       </ul>
                   </div>
   
  
positive.code:             <div class="help_content">
                  <br/><br/>
                  <a href='#' class='help_btn'>帮助教程</a>
              </div>
          </div>
  
  
negative.code:         </div>
      </div>
  
      <script src="js/index1.js" type="text/javascript"></script>
  
  </body>
  