Hi.
I fixed the problem.
Edit the file
templates/ja_megastore/html/com_virtuemart/sublayouts/products.php
Add this code at the end of the file.
<script type="text/javascript">
// Isotope
(function($){
$(document).ready(function(){
var $container = $('.isotope-layout .isotope');
if (!$container.length) return ;
$container.isotope({
itemSelector: '.item',
masonry: {
columnWidth: '.grid-sizer',
}
});
// re-order when images loaded
$container.imagesLoaded(function(){
// isotope after all images loaded.
$container.isotope();
jQuery('.loading_layer').remove(); // remove loading layer
});
});
})(jQuery);
</script>
Regards.