//画像のマウスオーバー
function newImage(arg) {
  if (document.images) {
    rslt = new Image();
    rslt.src = arg;
    return rslt;
  }
}

function changeImages() {
  if (document.images && (preloadFlag == true)) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
    }
  }
}

var preloadFlag = false;
function preloadImages() {
  if (document.images) {
    head_navi01_over = newImage("common/head_navi01on.gif");
    head_navi02_over = newImage("common/head_navi02on.gif");
    head_navi03_over = newImage("common/head_navi03on.gif");
    head_navi04_over = newImage("common/head_navi04on.gif");
    head_navi05_over = newImage("common/head_navi05on.gif");
    head_navi06_over = newImage("common/head_navi06on.gif");
    side_navi01_over = newImage("images/side_navi01on.gif");
    side_navi02_over = newImage("images/side_navi02on.gif");
    side_navi03_over = newImage("images/side_navi03on.gif");
    side_navi04_over = newImage("images/side_navi04on.gif");
    side_navi05_over = newImage("images/side_navi05on.gif");
    side_navi06_over = newImage("images/side_navi06on.gif");
    side_navi01_01_over = newImage("images/side_navi01_01on.gif");
    side_navi01_02_over = newImage("images/side_navi01_02on.gif");
    side_navi01_03_over = newImage("images/side_navi01_03on.gif");
    side_navi01_04_over = newImage("images/side_navi01_04on.gif");
    side_navi01_05_over = newImage("images/side_navi01_05on.gif");
    side_navi01_06_over = newImage("images/side_navi01_06on.gif");
    side_navi01_07_over = newImage("images/side_navi01_07on.gif");
    side_navi01_08_over = newImage("images/side_navi01_08on.gif");
    side_navi01_09_over = newImage("images/side_navi01_09on.gif");
    side_navi02_01_over = newImage("images/side_navi02_01on.gif");
    side_navi02_02_over = newImage("images/side_navi02_02on.gif");
    side_navi02_03_over = newImage("images/side_navi02_03on.gif");
    side_navi02_04_over = newImage("images/side_navi02_04on.gif");
    side_navi02_05_over = newImage("images/side_navi02_05on.gif");
    side_navi02_06_over = newImage("images/side_navi02_06on.gif");
    side_navi02_07_over = newImage("images/side_navi02_07on.gif");
    side_navi02_08_over = newImage("images/side_navi02_08on.gif");
    side_navi02_09_over = newImage("images/side_navi02_09on.gif");
    side_navi03_01_over = newImage("images/side_navi03_01on.gif");
    side_navi03_02_over = newImage("images/side_navi03_02on.gif");
    side_navi03_03_over = newImage("images/side_navi03_03on.gif");
    side_navi03_04_over = newImage("images/side_navi03_04on.gif");
    side_navi03_05_over = newImage("images/side_navi03_05on.gif");
    side_navi03_06_over = newImage("images/side_navi03_06on.gif");
    side_navi03_07_over = newImage("images/side_navi03_07on.gif");
    side_navi03_08_over = newImage("images/side_navi03_08on.gif");
    side_navi03_09_over = newImage("images/side_navi03_09on.gif");
	preloadFlag = true;
  }
}