In Joomla how to put logout link in Menu..?

In Joomla how to put logout link in Menu..?

1. Go to the Menu Manager
2. Find your Menu
3. Click on the Edit Menu Items Icon
4. Click on New
5. Click on External link
6. put this url on  link box "index.php?option=com_user&task=logout&return=Lw"
7. set Access Level = Registered
8. set title = "Logout"
9. set alias = "Logout"
10. set Logout Redirection URL to whatever URL you want e.g. /index.php
11. Click on Save

thats it