fix nav problem

@@ -26,7 +26,12 @@ function initNavScroll(opt) {
 
 
     iScroll = new IScroll($navBox[0], {
     iScroll = new IScroll($navBox[0], {
         scrollX: true,
         scrollX: true,
-        scrollY: false
+        scrollY: false,
+        mouseWheel: true,
+        scrollbars: true,
+        probeType: 3,
+        preventDefault: false,
+        click: true
     });
     });
 
 
     return {
     return {