// Should be included using 'defer' after servers.js let serverName = getRandomKey(instances); let url = instances[serverName]; console.log('Randomly selected: ', serverName, url); let linkElement = document.getElementById('reg-link'); linkElement.setAttribute('href', url); linkElement.innerHTML = 'Регистрация на ' + serverName; function getRandomKey(obj) { let keys = Object.keys(obj); return keys[ keys.length * Math.random() << 0 ]; };