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 <style type="text/css">
    .x-j-ul{
    }
    .x-j-btn{
      width: 25px;
      height: 25px;
      border-radius: 50%;
      border: 1px solid #525252;
      color: #525252;
      cursor: pointer;
    }
    .x-j-ul>li:last-child{
      margin-bottom: 0;
    }
    .x-j-ul>li:first-child .change-no{
      display: none;
    }
    /*.x-j-btn:not(.change-no)*/
  </style>
</head>
<body>
<!-- Top content -->
<!-- 分界线+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
<div class="ly-css clearfix col-sm-12">
  <div class="ly-box">
    <ul class="x-j-ul">
      <li class="flexa mb20">
        <div class="triangle-box  mr20">
          <select class="w100">
            <option disabled value="-">请选择</option>
            <option value="1" class="s">option1</option>
            <option value="2" class="s">option2</option>
          </select>
          <i></i>
        </div>
        <div class="triangle-box mr20">
          <select class="w100">
            <option disabled value="-">请选择</option>
            <option value="1" class="s">option1</option>
            <option value="2" class="s">option2</option>
          </select>
          <i></i>
        </div>
        <input class="w200" type="text">
        <div class="x-j-btn change-no flexca ml15" data-bind="1">-</div>
        <div class="x-j-btn  flexca ml15" data-bind="2">+</div>
      </li>
    </ul>
  </div>
</div>
<!-- Javascript -->
<script src="../static/js/jquery.min.js"></script>
<script src="../static/js/bootstrap.min.js"></script>
<script >
  $(document).ready(function() {
    $(document).on("click",".x-j-btn",function() {//修改成这样的写法
      var indexChe = $(this).data().bind;
      var str = '';
      if (indexChe == 2 && $('.x-j-ul').find('li').length < 10) {
        str += '<li class="flexa mb15">';
        str += $(this).parent().html();
        str += ' </li>';
        $('.x-j-ul li:last').after(str);
      } else if (indexChe == 1) {
        $(this).parent().remove();
      }
    })
  })
</script>
<!-- 分界线+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
</body>