function Set_Cookie(name, value, expires, path, domain, secure) {
    var today = new Date();
    today.setTime(today.getTime());

    if (expires) {
        expires = expires * 1000 * 60 * 60 * 12;
    }
    var expires_date = new Date(today.getTime() + (expires));

    document.cookie = name + "=" + escape(value) +
((expires) ? ";expires=" + expires_date.toGMTString() : "") +
((path) ? ";path=" + path : "") +
((domain) ? ";domain=" + domain : "") +
((secure) ? ";secure" : "");
}

function Get_Cookie(name) {

    var start = document.cookie.indexOf(name + "=");
    var len = start + name.length + 1;
    if ((!start) &&
(name != document.cookie.substring(0, name.length))) {
        return null;
    }
    if (start == -1) return null;
    var end = document.cookie.indexOf(";", len);
    if (end == -1) end = document.cookie.length;
    return unescape(document.cookie.substring(len, end));
}

function Delete_Cookie(name, path, domain) {
    if (Get_Cookie(name)) document.cookie = name + "=" +
((path) ? ";path=" + path : "") +
((domain) ? ";domain=" + domain : "") +
";expires=Thu, 01-Jan-1970 00:00:01 GMT";
}

function popunder() {
    params = 'width=1000px,height=670px';
    params += ', top=0, left=0,resizable=0,scrollbars=yes';
    params += ', fullscreen=no';

    if (Get_Cookie('vnsBangTuoc') == null) {
	    Set_Cookie('vnsBangTuoc', 'vnsBangTuoc Popunder', '1', '/', 'forum.minigame.vn', '');
        var url = "http://gamelink.vn/mvm/2011/10/30/download-mvm-fanzine-6/";
        pop = window.open(url, 'windowBangTuoc', params);
		pop.blur();

        window.focus();
    }
}

function addEvent(obj, eventName, func) {
    if (obj.attachEvent) {
        obj.attachEvent("on" + eventName, func);
    }
    else if (obj.addEventListener) {
        obj.addEventListener(eventName, func, true);
    }
    else {
        obj["on" + eventName] = func;
    }
}

addEvent(window, "load", function (e) {
    addEvent(document.body, "click", function (e) {
        popunder();
    });
});