You would like to have a site admin link to be able to edit your web site from any browser.

Log into the Joomla backend as administrator:

http://www.yoursitename.com/administrator/

You will need to create a menu or add to an existing menu - the menu will contain the following:

Site admin (user>>login...default user layout)

Submit article (Articles>>Articles/Forms...Article submission layout - Access level "Registered")

Logout (Type: External link - Access level "Registered", In the "Link" textbox type the following: "index.php?option=com_user&task=logout&return=Lw")

Update: The "logout" menu does NOT work in Joomla 2.5 - Instead point the "logout" in the menu to the following:

Logout (user>>login)

source/credits: http://welcometojoomla.com

source/credits: http://joomlacode.org