function ShowDealer(dealer) {
  document.getElementById('dsl').style.display = "none";
  document.getElementById('kp').style.display = "none";
  document.getElementById('lodz').style.display = "none";
  document.getElementById('lub').style.display = "none";
  document.getElementById('lubu').style.display = "none";
  document.getElementById('malop').style.display = "none";
  document.getElementById('maz').style.display = "none";
  document.getElementById('op').style.display = "none";
  document.getElementById('podk').style.display = "none";
  document.getElementById('podl').style.display = "none";
  document.getElementById('pom').style.display = "none";
  document.getElementById('sl').style.display = "none";
  document.getElementById('swiet').style.display = "none";
  document.getElementById('wlkp').style.display = "none";
  document.getElementById('wm').style.display = "none";
  document.getElementById('zp').style.display = "none";
  document.getElementById(dealer).style.display = "block";
}