小程序的点击事件不触发！！！！？？？

 <scroll-view scroll-y="true" >
    <view id="ss1" class="news_content">
      <view class='news_content_right'>
        <image src="/imgs/index/timg.png" />
      </view>
      <view class='news_content_left'>
        <view class='news_content_left_top'>
          <text style='font-weight:bold'>小白菜</text>
        </view>
        <view class='news_content_left-but' style=''>
          <view style='float:left;width:30%;height:100%'>
            <text style='font-size:17px;font-weight:bold;color:#FEB70F;'>￥3.5/斤</text>
          </view>
          <view class='viewShop' id="plus1" bindtap="xxplus">
            <image bindtap="xxplus" style='width:17px;height:17px;' src="/imgs/shop/plus.png"></image>
          </view>
          <view class='viewShop'>
            <text style='font-size:12px' id="count">0</text>
          </view>
          <view class='viewShop' bindtap='xxminus'>
            <image style='width:17px;height:17px;' src="/imgs/shop/minus.png"></image>
          </view>
        </view>
      </view>
    </view>
    <view style='height:100px'></view>
  </scroll-view>
js
  xxminus:function(){
    wx.showModal({
      title: '提示',
      content: '减1',
      showCancel: false
    });
  },
  xxplus:function(){
    wx.showModal({
      title: '提示',
      content: '加1',
      showCancel: false
    });
  },
```xxplus和xxminus都触发不了事件，请问是怎么回事！！！！

你的js文件引入对么

xxplus:function(e){}