Fix variable declaration

media/js/wnd/wnd.js

-wnd = {}
+var wnd = {}
 wnd.$ = {}
 
 wnd.isShow = false;
@@ -38,4 +38,4 @@ $(function() {
   wnd.$.block = $(".window-block");
   wnd.$.title = $(".window-title");
   wnd.$.content = $(".window-content");
-});
\ No newline at end of file
+});