https://svetubytovani.cz/static/experiments/js/experiments.js

1experiments = function() {
2    return {
3        confirm_human: function() {
4            $.post("/experiments/confirm_human/");
5        },
6        goal: function(goal_name) {
7            $.post("/experiments/goal/" + goal_name);
8        }
9    };
10}();
11
12if (document.addEventListener) {
13    // sets the cookie in the capturing phase so that in the bubbling phase we guarantee that if a request is being issued it will contain the new cookie as well
14    document.addEventListener("click", function(event) {
15        if ((event.target).hasAttribute('data-experiments-goal')) {
16            $.cookie("experiments_goal", $(event.target).data('experiments-goal'), { path: '/' });
17        }
18    }, true);
19} else { // IE 8
20    $(document).delegate('[data-experiments-goal]', 'click', function(e) {
21        // if a request is fired by the click event, the cookie might get set after it, thus the goal will be recorded with the next request (if there will be one)
22        $.cookie("experiments_goal", $(this).data('experiments-goal'), { path: '/' });
23    });
24}