fix nav problem

@@ -31,11 +31,10 @@ function initNavScroll(opt) {
     iScroll = new IScroll($navBox[0], {
         scrollX: true,
         scrollY: false,
-        mouseWheel: true,
-        scrollbars: true,
-        probeType: 3,
-        preventDefault: true,
-        click: true
+        tap: true,
+        eventPassthrough: true,
+        useTransform: false,
+        useTransition: false
     });
 
     return {