function GetLang() {
    loc = location.href.split('?');
    if (loc.length > 1) {
        params = loc[1].split('&');
        for (i = 0; i < params.length; i++) {
            data = params[i].split('=');
            if (data[0] == "lang") {
                document.write(data[1]);
            }
        }
    } 
}