Merge branch 'release/5.3' of git.yoho.cn:fe/yohobuywap-node into release/5.3

@@ -11,12 +11,10 @@ var $ = require('yoho-jquery'),
 
 require('./detail/page-render')(function() {
     var $discountFolder = $('.goods-discount .discount-folder'),
-        $discountArrow = $('.goods-discount .first-item span'),
-        $bannerSwiper = $('.banner-swiper');
+        $discountArrow = $('.goods-discount .first-item span');
 
     var goodsDiscountEl = document.getElementById('goodsDiscount'),
         goodsDiscountHammer = goodsDiscountEl && new Hammer(goodsDiscountEl),
-        bannerSwiperHammer = new Hammer($bannerSwiper[0]),
         $discountFirstItem = $(goodsDiscountEl).find('.first-item');
 
     var $cart = $('.cart-bar');
@@ -59,10 +57,14 @@ require('./detail/page-render')(function() {
         prevButton: '.my-swiper-button-prev',
         spaceBetween: 3
     });
-    bannerSwiperHammer.on('tap', function() {
-        $('.banner-top').toggleClass('hover');
-        swiper.onResize();
-    })
+    if ($('.banner-swiper').length) {
+        var bannerSwiperHammer = new Hammer($('.banner-swiper')[0])
+        bannerSwiperHammer.on('tap', function() {
+            $('.banner-top').toggleClass('hover');
+            swiper.onResize();
+        })
+    }
+    
 
     // 初始化goods-discount
     if ($discountFolder.children().length === 0) {