fix the issue of scroll bar show when there is no scroll. code review by XWG

@@ -22,6 +22,9 @@ require('./good');
 
 lazyLoad($('img.lazy'));
 
+console.log($(document).height());
+console.log($(window).height());
+
 if ('advance' === cartType) {
     $cartContent.toggleClass('hide');
 }
@@ -82,5 +85,16 @@ if ($('.cart-zero').length > 0) {
     require('../product/recommend-for-you');
 }
 
+function notAllowScroll() {
+    var docH = $(document).height(),
+        winH = $(window).height();
+
+    if (docH - winH <= 10) {
+        $('body').css('overflow', 'hidden');
+    }
+}
+
+notAllowScroll();
+
 //提前触发lazyload
 $(window).scrollTop(1).scrollTop(0);