Merge branch 'develop/wap' of git.dev.yoho.cn:web/yohobuy into develop/wap

@@ -25,18 +25,24 @@ var start = 0,
 lazyLoad($('img.lazy'));
 
 $('.nav-btn').on('touchstart', function(event) {
+    $sideNav.css('pointer-events', 'none');
     $mobileWrap.addClass('menu-open');
     $overlay.show().css('opacity', 0.3);
     $sideNav.addClass('on');
-    openSideNav = true;
     event.preventDefault();
     event.stopPropagation();
+    openSideNav = true;
 
     //设置boy高宽，页面不能上下滑动
     $('body').css({
         height: $(window).height(),
         overflow: 'hidden'
     });
+
+    setTimeout(function() {
+        $sideNav.css('pointer-events', 'auto');
+    }, 400);
+
     return false;
 });