function show_hide(id,idh)
{
    var h=document.getElementById(idh);
    var c=document.getElementById(id);
    var now=c.className;
    if (now!='hidden') 
    {
        c.className='hidden';
        h.style.backgroundColor="red";
    }
    else 
    {
        c.className='show';
        h.style.backgroundColor="white";
    }
}
function change_lang(lang)
{
//    return false;
    path=document.location.pathname;
    path_lang=path.substring(0,4);


   if(path_lang!='/en/' && lang=='en')  {document.location.pathname='/en'+path; return false;}
   if(path_lang=='/en/' && lang=='pl')  {document.location.pathname='/en_to_pl'+path.substring(3); return false;}
}

function hide_lang()
{
    document.getElementById('languages').style.display='none';
}