//subnavi init:
submenu1_lo = new Image();
submenu1_hi = new Image();
submenu2_lo = new Image();
submenu2_hi = new Image();

submenu1_lo.src = "img/navis/sub_home_welcome_lo.gif";
submenu1_hi.src = "img/navis/sub_home_welcome_hi.gif";
submenu2_lo.src = "img/navis/sub_home_first_lo.gif";
submenu2_hi.src = "img/navis/sub_home_first_hi.gif";