<scroll-view scroll-y="true" >
 <view class="user_freeback"> 
<view class="txt">
 <text> 为了更好地帮助您解决问题,请准确填写您的邮箱地址和电话号码，以便管理员给你答复。</text>
 </view>
 </view>
<view class="section weui-media-box weui-media-box_appmsg"> 
      <view class="section__title">希望回访:</view> 
      <view class='form-group'> 
     <checkbox-group bindchange="btn_cbback_tab">
     <label style="display: flex;" ><checkbox value="1" checked="checked"/> </label>
     </checkbox-group>
      </view>   
</view>
<view class="{{tipsshow}} section weui-media-box weui-media-box_appmsg"> 
      <view class="section__title">您的姓名:</view> 
      <view class='form-group'> 
         <input type="text" name="txtusername" placeholder="请输入您的姓名" />
      </view>   
</view>
 
<view class="{{tipsshow}} section weui-media-box weui-media-box_appmsg"> 
      <view class="section__title">您的邮箱:</view> 
      <view class='form-group'> 
         <input type="text" name="txtemail" placeholder="请输入您的邮箱" />
      </view>   
</view>
<view class="{{tipsshow}} section weui-media-box weui-media-box_appmsg"> 
      <view class="section__title">联系电话:</view> 
      <view class='form-group'> 
         <input type="text" name="txttel" placeholder="请输入您的联系电话" />
      </view>   
</view>
<view class="section weui-media-box weui-media-box_appmsg"> 
      <view class="section__title">您的主题:</view> 
      <view class='form-group'> 
         <input type="text" name="txttitle" placeholder="请输入您的您的主题" />
      </view>   
</view>
<view class="section weui-media-box weui-media-box_appmsg"> 
      <view class="section__title">咨询内容:</view> 
      <view class='form-group'> 
         <textarea auto-height name="txtcontent" placeholder="请输入您的咨询内容" />
      </view>   
</view>
 <view class="weui-msg__text-area">
 <button class="btns" formType="submit" size="default"> 我要咨询 </button> 
  </view> 

Page({
 /**
  * 页面的初始数据
  */
 data: {
  tipsshow:''
 },


 btn_cbback_tab: function (e) {


  if (e.detail.value!="")
   {
   this.setData({
    tipsshow: 'undis'
   })
   }
  else
   {
   this.setData({
    tipsshow: ''
   })


   }
 




 },
 onLoad: function (options) {
 
 },


 /**
  * 生命周期函数--监听页面初次渲染完成
  */
 onReady: function () {
 
 },


 /**
  * 生命周期函数--监听页面显示
  */
 onShow: function () {
 
 },


 /**
  * 生命周期函数--监听页面隐藏
  */
 onHide: function () {
 
 },


 /**
  * 生命周期函数--监听页面卸载
  */
 onUnload: function () {
 
 },


 /**
  * 页面相关事件处理函数--监听用户下拉动作
  */
 onPullDownRefresh: function () {
 
 },


 /**
  * 页面上拉触底事件的处理函数
  */
 onReachBottom: function () {
 
 },


 /**
  * 用户点击右上角分享
  */
 onShareAppMessage: function () {
 
 },


 /**
  * 页面上拉触底事件的处理函数
  */
 onReachBottom: function () {
 
 },


 /**
  * 页面相关事件处理函数--监听用户下拉动作
  */
 onPullDownRefresh: function () {
 
 }
})