function launchchat(mylink, windowname) {
        if (!window.focus) return true;
        var href;
        if (typeof (mylink) == 'string')
            href = mylink;
        else
            href = mylink.href;
        window.open(href, windowname, 'width=420,height=610,scrollbars=no');
        return false;
    }

    function launchfreecourse(mylink, windowname) {
        if (!window.focus) return true;
        var href;
        if (typeof (mylink) == 'string')
            href = mylink;
        else
            href = mylink.href;
        window.open(href, windowname, 'width=420,height=500,scrollbars=no');
        return false;
    }