https://www.performancedays.com/files/performancedays/layout/js/logos.js?v=9891515e

1function setLogo() {
2    if (typeof exlogosAlt == 'undefined') return;
3    if (exlogosAlt.length == 0) {
4        exlogosAlt = exlogos.slice();
5    }
6    l = exlogosAlt.pop();
7    if (exlogosAlt.length == 0) exlogosAlt = exlogos.slice();
8    var place = Math.floor(Math.random() * 6);
9    $("#logol" + place + " img").fadeOut(800, function () {
10        $("#logol" + place + " img").attr("src", l["logo_color"]);
11        $("#logol" + place + " img").attr("alt", l["company"]);
12        $("#logol" + place + " img").fadeIn(800);
13        setTimeout(function () {
14            setLogo();
15        }, 3000);
16    });
17}
18
19setLogo();