https://websmm.biz/js/common-2.0.js

1// coded by Vadim Garinov (special for all-for-vkontakte.ru)
2
3function hasElement(f_tag, f_selector){
4function checkType(value) {
5    var s = typeof value;
6    if (s === 'object') {
7        if (value) {
8            if (Object.prototype.toString.call(value) == '[object Object]') {
9                s = 'object';
10            }else{
11                s = '';
12            }
13        } else {
14            s = 'null';
15        }
16    }
17    return s;
18}
19    if (checkType(f_tag) == 'object'){
20        return f_tag.is(f_selector);
21    }
22    if (checkType(f_tag) == 'string'){
23        return $(f_tag).is(f_selector);
24    }   
25}
26
27        //
28        function showAlert(f_message){
29                uAlert.open('ofRoot', 'black', f_message, 3000);
30        }
31
32        //
33        function isRoot(){
34                return g_user_group_id == 4;
35        }