window.onload = function() {
  display();
  kensa_change();
}

function display(){

  obj_gaiyo = document.getElementById("gaiyo");

  if(obj_gaiyo) {
    index = obj_gaiyo.selectedIndex;
    if (index != 1) {
      document.getElementById("disp_01").style.display = 'none';
      document.getElementById("disp_02").style.display = 'none';
      document.getElementById("disp_03").style.display = 'none';
      document.getElementById("disp_04").style.display = 'none';
      document.getElementById("disp_05").style.display = 'none';
      document.getElementById("disp_06").style.display = 'none';
      document.getElementById("disp_07").style.display = 'none';
      document.getElementById("naiyo_dummy").innerHTML = '';
    } else {
      document.getElementById("disp_01").style.display = '';
      document.getElementById("disp_02").style.display = '';
      document.getElementById("disp_03").style.display = '';
      document.getElementById("disp_04").style.display = '';
      document.getElementById("disp_05").style.display = '';
      document.getElementById("disp_06").style.display = '';
      document.getElementById("disp_07").style.display = '';
      document.getElementById("naiyo_dummy").innerHTML = '<input name="naiyo" type="hidden" value="　" />';
    }
  }

}

// 項目「希望検査」の関数 - jsOFFを考慮してHTML上に書いてある項目を消す方式
function kensa_change(){

  obj_kensa = document.getElementById("kensa");

  if(obj_kensa) {
    var txt = '午後';
    var t01 = document.getElementById("t01"); //第一希望の時間帯
    var t02 = document.getElementById("t02"); //第一希望の時間帯
    var t03 = document.getElementById("t03"); //第一希望の時間帯
    index_kensa = obj_kensa.selectedIndex;
    if (index_kensa != 1) {                   //胃内視鏡検査以外なら「午後」項目あり
      t01.options[2] = new Option(txt, txt);
      t02.options[2] = new Option(txt, txt);
      t03.options[2] = new Option(txt, txt);
    } else {                                  //胃内視鏡検査なら「午後」項目なし
      t01.options[2] = null;
      t02.options[2] = null;
      t03.options[2] = null;
    }
  }

}