How to set focus on login box that render when click on sub menu bar?

How to set focus on login box that render when click on sub menu bar?

References

Reference NO 1

http://stackoverflow.com/questions/13640619/how-to-set-focus-on-login-box-that-render-when-click-on-sub-menu-bar

Reference NO 2

http://msdn.microsoft.com/en-us/library/windows/desktop/aa511502.aspx

Reference NO 3

http://wiki.secondlife.com/wiki/Advanced_menu

Reference NO 4

http://wiki.phoenixviewer.com/fs_menus

Reference NO 5

http://docs.joomla.org/Creating_a_submenu

Reference NO 6

http://library.creativecow.net/articles/williams_richard/spry_menu_explained.php

Reference NO 7

http://wiki.jqueryui.com/w/page/38666403/Menubar

Reference NO 8

http://wijmo.com/widgets/wijmo-open/menu/