// pouzivano misto (v norme Strict) zakazaneho target='_blank'
function external(url) {
    win = window.open(url);
    return (typeof(win)=='object') ? false : true;
}

// otevre nove okno - url se zjisti z parametru href
// pouzivano misto (v norme Strict) zakazaneho target='_blank'
function external_link(elem) {
    if (elem.getAttribute('href')) {
        return external(elem.getAttribute('href'));
    }
    return true;
}