function set_lang(lang)
{
    setTimeout('set_lang1("'+lang+'")', 200);
    return false;
}
function set_lang1(lang)
{
    r = /^(http:\/\/[^\/]+\/)([a-z]{2}\/)?(.*)/
    h =r.exec(window.location) ;
    r2=h[1]+lang+"/"+h[3];
    window.location = r2; 
}