http://primordial.org.ua/wp-content/plugins/soc-zakladka/addtofavorites.js?ver=5.1.19

1function AddToFavorites()  
2{  
3    var title = document.title; var url = location.href;  
4    if (window.sidebar) // Firefox  
5        window.sidebar.addPanel(title, url, '');  
6    else if(window.opera && window.print) // Opera  
7    {  
8        var elem = document.createElement('a');  
9        elem.setAttribute('href',url);  
10        elem.setAttribute('title',title);  
11        elem.setAttribute('rel','sidebar'); // required to work in opera 7+  
12        elem.click();  
13    }   
14    else if(document.all) // IE  
15        window.external.AddFavorite(url, title);  
16}