I see you an old client and bought this Pagination layout back in 2010. Definitely, much has changed over these years.
The latest update for Pagination is version 1.5, with lots of changes:
Lazy loading of images;
New vector icons for better results on high-density screens;
10 color schemes added;
Localization for PREV & NEXT buttons.
Redesigned to become cleaner and more contrast;
Improved page navigation panel;
Semantic <article> HTML5 tag is used to specify items;
<li> tags are no longer used to remove the influence of CSS styles for lists on different sites;
Much more flexible and responsive behavior thanks to the use of flexbox.
Fix compatibility problems with latest jQuery version;
Moved to alternative PHP syntax, as it is easier to read when mixing HTML and PHP;
You may want to see more about this: https://www.raxo.org/blog/148-update-fo ... t-v15.html
Pagination Layout v1.5 uses Lazy Loading for thumbnails located on the 2nd and following pages.
"For faster web page loads the module initially loads images only for the first page. The next portion of images is loaded only when they appear in the browser’s viewport, so some images are not loaded at all if a user doesn’t navigate to other pages. Such a technique helps to significantly reduce the time needed for a web page to load. This is especially noticeable when displaying long pagination lists of Joomla articles."
For this, the Pagination layout uses new features for working with images that appeared in version 1.9 of the module.
Therefore, for stable operation, we recommend using the latest versions of our products.