function SubMenuImgInit() {
  for (i=1;i<=4;i++) {
    eval("submenu"+i+"_lo = new Image();");
    eval("submenu"+i+"_hi = new Image();"); }

  submenu1_lo.src = "img/navi_01_01_lo.gif";
  submenu1_hi.src = "img/navi_01_01_hi.gif";
  submenu2_lo.src = "img/navi_01_02_lo.gif";
  submenu2_hi.src = "img/navi_01_02_hi.gif";
  submenu3_lo.src = "img/navi_01_03_lo.gif";
  submenu3_hi.src = "img/navi_01_03_hi.gif";
  submenu4_lo.src = "img/navi_01_04_lo.gif";
  submenu4_hi.src = "img/navi_01_04_hi.gif";

}  SubMenuImgInit();