layui 实现搜索下拉

 <div class="layui-form-item">
        <label class="layui-form-label" labl-width="100px"><font class="red">*</font>搜索下拉</label>
        <div class="layui-input-block">
          <input type="text" name="choiseInput" id="choiseInput" placeholder="搜索下拉" class="layui-input" style="position:absolute;z-index:2;width:80%; border-right: 0px;" lay-verify="required" value="" οnkeyup="search()" autocomplete="off">
          <select id="searchInput" lay-filter="searchInput" autocomplete="off" placeholder="搜索下拉" lay-verify="required" class="layui-select" lay-search>
            <option value="">请选择</option>
          </select>
        </div>
      </div>   

 form.on('select(searchInput)', function (data) {   //选择移交单位 赋值给input框
        $("#choiseInput").val(data.value);
        $("#searchInput").next().find("dl").css({ "display": "none" });
        form.render();
      });

  window.search = function () {
    var value = $("#choiseInput").val();
    $("#searchInput").val(value);
    form.render();
    $("#searchInput").next().find("dl").css({ "display": "block" });
    var dl = $("#searchInput").next().find("dl").children();
    var j = -1;
    for (var i = 0; i < dl.length; i++) {
      if (dl[i].innerHTML.indexOf(value) <= -1) {
        dl[i].style.display = "none";
        j++;
      }
      if (j == dl.length-1) {
        $("#searchInput").next().find("dl").css({ "display": "none" });
      }
    }
  }