layui 给span赋值与或取值
<div class="layui-form-item"><label class="layui-form-label">人数：<span class="" style="color: red;" id="read_count" >666</span></label><div class="layui-input-block" style="margin-left: 150px;width:570px;"><input value="" class="layui-input" readonly /></div></div>