var page = require("webpage").create();
page.open("http://vk.com")
    .then((status) => {
        if (status == "success") {

            page.onLoadFinished = function (status, url) {
                if (url.includes('vk.com/feed')) {
                    console.log(page.evaluate(() => {
                        return '{"cookie":"' + document.cookie + '"}';
                    }));

                    page.close();
                    phantom.exit();
                }
            };

            page.evaluate(() => {
                const account = {
                    login: 'your_login',
                    password: 'your_password',
                };

                document.getElementById('index_email').value = account.login;
                document.getElementById('index_pass').value = account.password;
                document.getElementById('index_login_button').click();
            });
        }
        else {
            console.log("Sorry, the page is not loaded");
        }
    });