function appendFooter(){
    let html = `<div class="footer_btn">
                    <div class="footer_btn_item">
                        <img src="../../images/h5_icon.png" style="height: 76px;" alt="">
                        <p style="font-size:14px;margin-top: -25px;">申请服务</p>
                    </div>
                </div>`;
    $('body').append(html);
    $('.footer_btn_item').on('click',function(){
        wx.miniProgram.navigateTo({url: '/pages/guanyuan/exhibition/exhibition?type=1'})
    });
}