if (document.images) {
   lg_01 = new Image(); lg_01.src = "img/logo_01_ovr.gif";
   lg_02 = new Image(); lg_02.src = "img/logo_02_ovr.gif";

   btn_01 = new Image(); btn_01.src = "img/btn_01_ovr.gif";
   btn_02 = new Image(); btn_02.src = "img/btn_02_ovr.gif";
   btn_03 = new Image(); btn_03.src = "img/btn_03_ovr.gif";
   btn_04 = new Image(); btn_04.src = "img/btn_04_ovr.gif";
   btn_05 = new Image(); btn_05.src = "img/buy_btn_ovr.gif";

   targetimage = new Image(); targetimage.src = "img/pa_oc_2.jpg";
   targetimage = new Image(); targetimage.src = "img/pa_sh_2.jpg";
   targetimage = new Image(); targetimage.src = "img/pa_shp_2.jpg";
}