https://skin.prismashop.fr/skin/frontend/base/default/webcooking/js/all.js

1function showOverlayOnElement(element) {
2    element = $(element);
3    if(!element) return;
4    if(!element.id) element.identify();
5    overlayElement = Element.clone($('wc-overlay'), true);
6    overlayElement.setAttribute('id', element.id+'-wc-overlay');
7    overlayElement.setStyle({
8        display:'block', 
9        top: element.cumulativeOffset().top+'px', 
10        width: element.getWidth()+'px', 
11        height: element.getHeight()+'px', 
12        left: element.cumulativeOffset().left+'px'
13    });
14    $$('body')[0].insert(overlayElement);
15}
16function hideOverlayOnElement(element) { 
17    $(element.id+'-wc-overlay').remove();
18}
19function showOverlayOnElements(elements) {
20    for(var i=0; i<elements.lenght; i++) {
21        showOverlayOnElement(elements[i]);
22    }
23}
24function hideOverlayOnElements(elements) {
25    for(var i=0; i<elements.lenght; i++) {
26        hideOverlayOnElement(elements[i]);
27    }
28}