HOW TO: Identify Joomla! Version
Access to Joomla! Back-end
For Joomla 1.5, you can simply login to the admin panel and see the version on the top right of the admin panel to check the version. For Joomla 1.6, 1.7 and 2.5, the version is listed at the bottom of the pages or you can choose from menu Site -> System Information.
Check by css (or .ini) Files
If you do not have access to Joomla Back-End, there are several ways you can identify your Joomla version. First, you can check the version by browsing through the css (or .ini) files to this file location:
/templates/system/css/system.css
Find and open the file in your browser then check for this:
/templates/system/css/system.css
Find and open the file in your browser then check for this:
Check by MooTools
Another way it’s to compare MooTools (JavaScript Framework) versions using a media/system/js/mootools-more.js file:
Check by Language file
You can also identify your Joomla version (Joomla 1.6 / Joomla 1.7.x) by comparing the date in language file: language/en-GB/en-GB.ini