select 切换选中

select 切换选中 关键词 prop(),不能用attr()

html  部分
                <div class="form-group">
                    <label class="col-lg-2 control-label" style="width: 110px;height: 34px;line-height: 34px;">&nbsp;&nbsp;&nbsp;&nbsp合同&nbsp:</label>
                    <div class="col-lg-4">
                      <select style="margin-right:15px;" name="type" id="type" class="form-control" onchange="change($(this))">
                          <option value="">请选择</option>
                        {loop $htlist $v}
                          <option value="{$v['id']}" >[{$v['name']}]&nbsp;{$v['tid_name']}</option>
                        {/loop}
                      </select>
                    </div>
                    <label class="col-lg-2 control-label" style="width: 110px;height: 34px;line-height: 34px;">业务员:</label>
                    <div class="col-lg-4">
                      <select style="margin-right:15px;" name="teacher" id="teacher" class="form-control" onchange="change_2($(this))">
                          <option value="">请选择</option>
                          {loop $tclist $tv}
                          <option value="{$tv['id']}" >{$tv['tname']}</option>
                          {/loop}
                      </select>
                    </div>
                </div>


js

//---------------监听select1
function change(e) { //选择合同模板
  // $("#teacher").find("option").attr("selected",false);

  $.ajax({
    url: "{php echo $this->createWebUrl('receipt',array('schoolid' =>$schoolid,'mt' =>'select'))}",
    data: {htid: e.val()},
    type: 'post',
    async: false,
    success: function(res) {
      rlt = JSON.parse(res);
      $("#teacher").find("option[value="+rlt.result.tid+"]").prop("selected",true);
    },
  });
}