//　ナビゲーション画像のプレロード
  if (document.images) {
  navi01_f2 = new Image(110 ,31); navi01_f2.src = "_commonimg/navi01_f2.gif";
  navi01_f1 = new Image(110 ,31); navi01_f1.src = "_commonimg/navi01.gif";
  navi02_f2 = new Image(110 ,31); navi02_f2.src = "_commonimg/navi02_f2.gif";
  navi02_f1 = new Image(110 ,31); navi02_f1.src = "_commonimg/navi02.gif";
  navi03_f2 = new Image(110 ,31); navi03_f2.src = "_commonimg/navi03_f2.gif";
  navi03_f1 = new Image(110 ,31); navi03_f1.src = "_commonimg/navi03.gif";
  navi04_f2 = new Image(110 ,31); navi04_f2.src = "_commonimg/navi04_f2.gif";
  navi04_f1 = new Image(110 ,31); navi04_f1.src = "_commonimg/navi04.gif";
  navi05_f2 = new Image(110 ,31); navi05_f2.src = "_commonimg/navi05_f2.gif";
  navi05_f1 = new Image(110 ,31); navi05_f1.src = "_commonimg/navi05.gif";
  navi06_f2 = new Image(110 ,31); navi06_f2.src = "_commonimg/navi06_f2.gif";
  navi06_f1 = new Image(110 ,31); navi06_f1.src = "_commonimg/navi06.gif";
  }