[Bearbeiten] What does it do?
"This extension facilitates the dynamic creation of graphical headers, menus and other objects in TYPO3 using CSS and 'FIR' or image replacement techniques.
Image replacement using CSS–sometimes called FIR or Fahrner Image Replacement after one of the originators of the technique–is a way of using CSS to display a background image in place of a header, link or other text item. Using this technique can open up new design possibilities for web sites and pages and may–depending on the implementation–be more accessible to partially or non-sighted users, and users of 'small screen' browsers than equivalent techniques using HTML image elements.
The FIR Tools extension uses a small amount of php to augment TYPO3's native capabilities (specifically for determining and making available the dimensions of generated images), but relies mostly on Typoscript to generate and configure the HTML, CSS and graphics used in FIR objects. The extension ships with a static TS template containing a basic implementation of a list-based graphical menu and h1 headers.
The extension's sample implementations use a modified version of 'LIR' (see links), but is designed to be neutral with respect to any given type of image replacement.
To find out more about the advantages–and possible disadvantages–of FIR in general as well as some of the specific implementations, see the following list of links: