One of the most common problems in a multi-user Joomla environment is content’s locking due to an incorrect end of editing session. The main issue is that only the user who locked the content is allowed to unlock it.
To overcome this problem, users usually rely on an (super) administrator user action, since it’s the only user level who can access the Global Chek-in tool in the backend panel.
The main concern in this ACL rule on Joomla is that most of the times users who manage the website contents have a manager access level, since this user level is much more restricted on technical configuration’s options.
To allow Global Check-in action for managers, just edit the core file located at /libraries/joomla/users/authorization.php adding below line 91 the following code:
$this->addACL( "com_checkin", "manage", "users", "manager" );
Important: Since this is a core hack, keep in mind that it could be overwritten on further upgrades!
Tom 
How Can we do this in joomla 1.3 Please Help Author.