function sprawdz_form()
{
  var MailOd1 = document.getElementById("mail_od1").value;  // imię i nazwosko
  var MailOd2 = document.getElementById("mail_od2").value;  // e-mail
  var MailOd3 = document.getElementById("mail_od3").value;  // telefon
  var MailTytul = document.getElementById("mail_tytul").value;
  var MailTresc = document.getElementById("mail_tresc").value;

  if(MailOd1 == "")
    alert("Wpisz Twoje imię i nazwisko");
  else if( (MailOd2 == "") && (MailOd3 == "") )
    alert("Musisz podać Twój adres e-mail i/lub telefon.");
  else if(MailTytul == "")
    alert("Wpisz temat wiadomości.");
  else if(MailTresc == "")
    alert("Wpisz treść wiadomości.");
}

function ustaw()
{
  if( document.getElementById("galeria") )
    document.getElementById("galeria").style.display = "block";
  if( document.getElementById("galeria0") )
    document.getElementById("galeria0").style.display = "none";
}

/***************************/

function wycena_krok(nr, type){
  if( type=='next' ) nr++;
  document.getElementById('input_krok_kierunek').value = type;
  document.getElementById('input_krok').value = nr;
  document.getElementById('form_wycena_okien').submit();
}

function wo_popup(){
  var width = 800; var height = 600;
  var top = Math.round((screen.height-height)/2);
  var left = Math.round((screen.width-width)/2);
  window.open("index.php?k=wycena_okien","wo_popup",'width=' + width + ',height=' + height + ',top='+top+',left='+left+',resizable=yes,scrollbars=yes,menubar=no');
}
function new_window(url, name, width, height){
  var top = Math.round((screen.height-height)/2);
  var left = Math.round((screen.width-width)/2);
  window.open(url, name,'width=' + width + ',height=' + height + ',top='+top+',left='+left+',resizable=yes,scrollbars=yes,menubar=no');
}