$(document).ready(function(){
  const $sehir_select = $("select[name=sehir]");
  const $ilce_select = $("select[name=ilce]");
  const $save_button = $("button[data-role=save]");
  
  $sehir_select.find("option").eq(0).siblings().remove();
  for(let i=0; i<data.length; i++){
    $sehir_select.append(`<option value="${data[i].plaka}">${data[i].il}</option>`);
  }
  
  $sehir_select.on("change",function(){
    const target = $(this).val();
    const targetData = data.find(function(x){return x.plaka==target});
    if(!targetData) { alert("Bu ile ait ilçe kaydı bulunamadı."); return; }
    $ilce_select.find('option').eq(0).prop("selected",true).siblings().remove();
    $save_button.prop("disabled",true);
    for(let i=0; i<targetData.ilceleri.length; i++) {
      $ilce_select.append(`<option value="${targetData.ilceleri[i]}">${targetData.ilceleri[i]}</option>`);
    }
    $ilce_select.prop("disabled",false);
  });
  
  $ilce_select.on("change", function(){
    const selectedSehir = $sehir_select.val();
    const selectedIlce = $(this).val();    
    if(selectedIlce && selectedIlce!="0") $save_button.prop("disabled",false);
  })
  
   // Seçim yaptıralım.
  var selectedData = {
    il: "Adana",
    plaka: 1,
    ilce: "Ceyhan"
  };
  setSelectBoxes(selectedData);
  
})

    if ($_POST) {
            $adsoyad        = post('adsoyad');
            $telefon        = post('telefon');
            $adres          = post('adres');
            $il             = post('sehir');
            $ilce           = post('ilce');
            $yontem            = post('yontem');
            $urun_id        = post('urun_id');