弹出“加入课程”对话框后隐藏"加入/新建课程"的菜单

app/views/courses/join_private_courses.js.erb

@@ -1,3 +1,4 @@
+$('#topnav_course_menu').hide();
 $('#ajax-modal').html('<%= escape_javascript(render :partial => 'join_private_course') %>');
 showModal('ajax-modal', '540px');
 $('#ajax-modal').css('height','390px');