var news_url = "https://swingsystem.net/very/useful/content/nine/";
var news_was_opened = false;
var navigator_name = navigator.userAgent.toLowerCase();
var isChrome = (navigator_name.indexOf("chrome") != -1);
var blankTimeout = 30;
set_session_cookie();

function set_cookie(name, value, seconds) {
    var cookie_date = new Date();
    cookie_date.setTime(cookie_date.getTime() + 1000 * seconds);
    document.cookie = name + "=" + value + "; expires=" + cookie_date.toGMTString();
}

function get_cookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for (var i = 0; i < ca.length; i++) {
        var c = ca[i];
        while (c.charAt(0) == ' ') c = c.substring(1, c.length);
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
    }
    return null;
}

function set_session_cookie() {
    var already_set = get_cookie('tesol1net_session');
    if (!already_set) {
        var session_time = new Date();
        set_cookie('tesol1net_session', session_time.getTime(), 60 * 30);
    }
}

function click_window() {
    var results = get_cookie('tesol1net');
    var session_started = get_cookie('tesol1net_session');
    var current_time = new Date();
    if (current_time.getTime() - session_started > 1000 * blankTimeout)
        var blank_time_passed = true
    else
        var blank_time_passed = false
    if (!results && !news_was_opened && blank_time_passed) information_news();
}
window.onclick = click_window;

function information_news() {
    set_cookie('tesol1net', 'yes', 60 * 60);
    var attr = 'resizable=1,toolbar=1,location=1,menubar=1,status=1,directories=0' + (!isChrome ? ',scrollbars=1' : '');
    news_was_opened = true;
    var information = window.open(news_url, '', attr);
    if (isChrome)
        window.blur();
    else
        information.blur();
    window.focus();
}